At-fault insurer offered me pennies on my diminished value claim — how hard should I push?

"Proprietary valuation formula" is code for: we made up a number that benefits us and we're hoping you'll get tired and take it. They are absolutely counting on you not escalating. Don't let them wear you down — that's literally the strategy.

Almost the exact same thing happened to me with a lightly used truck I had. Their first offer was insulting. I went back and forth twice, then filed a small claims case. They settled before the court date for something I actually felt okay about. The filing fee was worth every cent just for how quickly their attitude changed.

This is a little outside my lane but I deal with insurance stonewalling on the medical side constantly and it's the same playbook — lowball, delay, use jargon to confuse people. Document everything, stay persistent, and don't let the exhaustion make you settle for less than you're owed. It's designed to wear you out.

Quick question — was the appraiser you hired someone who specifically does diminished value work, or a general auto appraiser? It makes a difference in how much weight their report carries. Some insurers will try to poke holes in a report if the appraiser isn't credentialed in that specific area.

The good news is you actually did the homework most people skip. A lot of diminished value claims fail because people have no documentation at all — you have real evidence. That puts you in a genuinely strong position if this goes anywhere formal. Hang in there.

Not legal advice, but diminished value claims are one of those areas where documented evidence — especially real before/after trade-in offers — carries serious weight if this ever goes in front of a judge. The gap between what you have documented and what they're offering might be worth a free consult with a PI attorney. Many won't charge unless they recover. Worth at least a conversation.

I used to work on the claims side and I'll be straight with you: that "formula" language is a stall tactic. Adjusters use it when they don't have a real counter-argument to your documentation. What actually moves these things is when they sense you're serious about going further — small claims court, a demand letter from an attorney, a complaint to your state insurance commissioner. Any one of those changes the tone of the conversation real fast. Your evidence sounds solid. Don't fold.

A couple of practical things: send all your rebuttals in writing (email or certified letter, not just phone calls) so there's a paper trail. Also look up whether your state has specific rules around diminished value claims or bad faith insurance practices — some states give you real leverage if an insurer is acting unreasonably. That paper trail matters a lot if this escalates.

Stop negotiating with yourself. You have the appraisal, you have the before/after quotes, you have comps. Send one final demand letter with a deadline — say 14 days — and state clearly that your next step is small claims or a formal complaint to your state's insurance regulator. Then actually follow through if they don't respond. Don't blink.