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Top 5 Home Seller Mistakes That Can Cost You Big

These five mistakes can cost you thousands, keep your home on the market longer, and eat into your equity. Here's how to avoid every one of them.
The Gillette Group  |  September 14, 2026

If you're thinking about selling your home, these are the top five mistakes that can cost you thousands, keep your home on the market longer, and eat into your equity.

Key Takeaways

  • Rushing through prep, skipping deep cleaning, decluttering, or staging, is one of the most common and costly mistakes sellers make.
  • Overpricing to leave room for negotiation almost always backfires, pricing right or slightly below often creates urgency and multiple offers instead.
  • Your first offer might be your best offer. Don't get offended by a lowball offer or toss it aside without countering.
  • Small unresolved repairs, leaky faucets, chipped paint, squeaky doors, invite lower offers and bigger repair requests later.
  • Choosing an agent based on comfort or the lowest commission can cost you far more than the commission difference ever would.

For more tips on selling your Arizona home, check out our sellers guide or reach out directly to us. Learn more about our team online.

The Direct Answer

The five biggest mistakes that cost home sellers money and time are rushing through prep, overpricing, ignoring or dismissing early offers, leaving minor repairs unresolved, and choosing the wrong agent. I lead a team that sells hundreds of homes every year, and here's what I've learned over my nearly 20 year real estate career about avoiding every one of them.

Mistake #1: Rushing Through Prep

Deep cleaning, decluttering, and sometimes staging aren't optional. A decluttered home sells for more, and thinking ahead with pre-packing makes your home look move-in ready and perfect for photos and showings.

Mistake #2: Overpricing

Pricing too high to leave room for negotiation, or basing your price on old sales, can backfire. In a slower market, pricing right, or even slightly below market, creates interest, sometimes even multiple offers, and a real sense of urgency that can actually lead to a higher final sales price than overpricing ever would.

Want an honest read on how your home stacks up before you list? Let's walk through it together.

Mistake #3: Not Taking the First Offer, or Ignoring a Lowball Offer

Don't get offended by a low offer, and don't toss it aside. Even if it's below what you hoped for, counter it. Sometimes you can even counter right at your list price. Often, your first offer ends up being your best offer, and if you don't take it, you may never see an offer that high again. Don't overthink it, look at the terms, the buyer's position, and your own goals. Moving too slowly here can cost you thousands.

Mistake #4: Ignoring Minor Repairs

Leaky faucets, chipped paint, squeaky doors, they all matter. Fix these before listing to avoid lower offers or a wave of repair requests later, and keep your home in top shape for both inspections and showings.

Mistake #5: Choosing the Wrong Agent

Going with a friend or family member might feel comfortable, but you could miss out on crucial marketing, negotiation skills, and experience. Some sellers pick an agent based purely on the lowest commission, which is genuinely a bad idea, because it can leave you feeling obligated to go with them regardless of fit.

Remember, it's not about what you pay your agent, it's about what you actually take home on closing day. A more experienced agent will typically help your home sell for more, even after accounting for commission.

There's also the agent who overvalues your home just to win your listing. The data doesn't lie. Just because someone tells you your home is worth a huge amount doesn't mean it actually is. The right agent helps you sell smarter, faster, and for more, not just tells you what you want to hear.

Avoid these mistakes and you'll sell smarter. For more tips on selling your Arizona home, check out our sellers guide or reach out directly to us. Learn more about our team online.

Frequently Asked Questions

What is the most common mistake home sellers make?

Rushing through prep, skipping deep cleaning, decluttering, or staging, is one of the most common mistakes, since a properly prepared home consistently sells for more.

Should I overprice my home to leave room for negotiation?

No. Overpricing generally backfires. Pricing accurately, or even slightly below market, tends to create more interest, urgency, and sometimes multiple offers, which can lead to a higher final sale price.

Should I ignore a lowball offer?

No. It's better to counter a lowball offer than dismiss it outright. Your first offer is often your best offer, and passing on it without negotiating can mean never seeing an offer that strong again.

Do small repairs really matter before listing?

Yes. Small issues like leaky faucets, chipped paint, and squeaky doors can lead to lower offers or a larger list of buyer repair requests later if left unaddressed.

Should I choose my real estate agent based on the lowest commission?

No. Choosing an agent based on the lowest commission, or picking a friend or family member for comfort, can cost you more than the commission savings, since experienced agents typically net sellers more on closing day.

How do I know if an agent is overvaluing my home just to get the listing?

Ask for the actual comparable sales data behind their number. A trustworthy agent backs up their valuation with real data rather than simply telling you what you want to hear to win your business.

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About the Author

Shannon Gillette

Shannon Gillette leads The Gillette Group, one of Arizona's premier real estate teams, bringing nearly 20 years of experience, innovative marketing, and deep local knowledge to every client she serves.

Shannon Gillette

Shannon Gillette is a recognized leader in Arizona real estate, known for her innovative marketing strategies, cinematic video production, and Realtor of the Year honors from Real Producers Magazine. She leads The Gillette Group, one of Arizona's premier real estate teams, bringing deep market knowledge and hands-on involvement to every transaction. A native of Chandler now living in Queen Creek, Shannon also co-founded Purpose Movement, a nonprofit supporting Arizona children in foster care.

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