The biggest mistake a real estate agent can make is putting the closing ahead of the client's long-term interest. Among all real estate agent mistakes, this one shows up as softened advice, rushed due diligence, or enthusiasm that outruns the facts. In luxury real estate in Los Cabos, where one purchase or sale is a major financial decision, that mistake is expensive and hard to reverse.
Most articles on this topic are written for new agents and focus on habits like poor follow-up or weak marketing. Those matter, but they are not what a buyer or seller actually pays for. Below we look at the mistake from the client's side of the table, and at how we try to avoid it.
Why is losing sight of the client's interest the costliest mistake?
Because every other error grows from it. An agent focused on the closing tends to agree with the client when they should push back. They show the property that photographs well instead of the one that fits the brief. They tell a seller what they want to hear about price.
The professional standard points the other way. Article 1 of the National Association of REALTORS® Code of Ethics says an agent's obligation to the client is primary, while still requiring honest treatment of all parties (NAR Code of Ethics). In practice that means candid counsel, even when it is uncomfortable.
Candid counsel can mean telling a buyer to walk away from a home they love, or telling a seller their number needs to move. It does not require drama. It requires saying the plain thing early, with the reasons, and letting the client decide.
What does this mistake look like for luxury buyers in Los Cabos?
The most common version is choosing on the view alone. A terrace, an ocean horizon and a staged living room can hide a lot. What matters over ten or twenty years is how the property was built, who built it, and how it holds up.
For buyers, the same mistake takes four common forms:
- Judging the finish, not the structure. Surfaces are easy to admire. Drainage, waterproofing, building systems and construction quality are harder to see and costlier to fix later.
- Skipping the developer's track record. This matters most with pre-construction and new developments, where you are buying something that does not fully exist yet.
- Moving too fast in an unfamiliar market. Buying in Mexico as a foreigner involves closing costs, taxes, rental rules and the fideicomiso. Article 27 of Mexico's Constitution restricts direct foreign ownership of land within 100 km of the borders and 50 km of the coasts, which is why coastal purchases by foreigners are commonly structured through a bank trust (Mexican Constitution, Article 27). The framework for foreign investment is set out in the Foreign Investment Law. An agent should explain this landscape in general terms and send the legal and tax questions to a qualified notary or attorney.
- Treating rental income as a given. No one can promise rental income or appreciation, and an agent who does is overreaching.
If you are comparing communities, an area such as Quivira Los Cabos shows why context matters. The right questions are about the specific property, its construction and its long-term value, not only the setting.
What mistakes do seller's agents make?
On the listing side, the pattern is the same: telling the client what is pleasant instead of what is useful. These are four general risks in any luxury market:
- Pricing to win the listing. An aspirational number may please the owner at the start, but a home that sits unsold sends its own message to the market.
- Ignoring preparation. Condition, maintenance items and presentation affect how buyers read a home. Raising them early is part of the advisory role.
- Poor timing advice. The right moment to list depends on the property and the owner's plans, not on a template.
- Vague valuation. A home valuation should come with reasoning you can follow, not just a figure.
If you are weighing a sale, ask the agent to show how they arrived at the price and what would change it.
What are red flags in a realtor?
Red flags are easiest to spot when you know what to listen for. None of these six proves bad intent on its own, but several together are worth pausing over.
- Promises of fixed returns, assured appreciation or assured rental income.
- Pressure to decide quickly without a clear reason.
- Answering legal or tax questions with confidence instead of referring you to a notary or attorney.
- Reluctance to discuss a developer's history or a building's construction.
- Showing only what is easy to sell, with no mention of drawbacks.
- Vague answers about how the process works from offer to closing.
A good agent is comfortable with questions. If questions are treated as friction, take note.
How does a builder's perspective change the advice?
This is where we think our approach differs. Cory Baglien brings 20+ years of experience in development, construction and property management across three countries: Canada, the U.S. and Mexico. He is a real estate advisor with The Oppenheim Group Cabo, and that background changes what he looks at during a showing.
Instead of starting with the view, he judges construction quality, developer track record and long-term value. For pre-construction and new developments, that means reviewing the project through a builder's eyes before it reaches a shortlist. We do not offer construction or remodeling services. The builder's view is there to inform your decision, not to sell you work.
It also shapes how we work with buyers. Through The Oppenheim Group's global luxury network, we can bring private, off-market listings into a buyer's shortlist, and we review them with the same scrutiny as anything on the open market.
What should you ask before hiring an agent?
A short conversation can tell you a lot. Here are six questions we think are worth asking any agent, including us.
| Question | What a sound answer sounds like |
|---|---|
| How do you evaluate construction quality? | Specific checks and a willingness to bring in the right specialists, not just comments on finishes. |
| How do you vet a developer? | A review of past projects, delivery history and how completed work has aged. |
| What happens if the property is not right for me? | A plain statement that they will tell you, even if it means no sale. |
| Can you promise rental income or appreciation? | No. A careful agent explains the variables and points you to qualified advisors. |
| Who handles legal and tax questions? | A notary or attorney, with your agent coordinating the process. |
| What will the process look like? | A clear sequence from first showing to closing, with someone accountable at each step. |
How do you avoid this mistake as a client?
Choose an agent for their judgment, not their enthusiasm. Ask for reasons behind every recommendation, and expect to hear about drawbacks as well as strengths. Keep legal, tax and financing questions with the professionals qualified to answer them.
It also helps to see how an agent has worked before. Our portfolio gives a sense of the kinds of properties we handle, and our blog covers other questions buyers and sellers in Los Cabos tend to ask. For a broader view of what we do, see how we approach luxury real estate across Los Cabos.
A private buyer briefing is a low-pressure way to test this. You describe what you want, we explain what we would look at and what we would question, and you decide whether the fit is right.
This article is general information, not legal, tax or financial advice. Please consult a qualified notary, attorney or tax professional about your own situation.
Sources referenced: NAR Code of Ethics; Mexican Constitution, Article 27; Mexico Foreign Investment Law.
If you would like to talk through your plans, you can get in touch with us here.
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