I checked my car (2004 Mazda RX-8), which was estimated around $8k. I actually sold through a Carvana-like service for under $1k because I got tired of listing it myself at under KBB's rec ($2k at the time, IIRC)The other online price checkers come in closer to the actual amount I received.

What's the difference between what you're doing, and why should I trust your number? Something that far out of expectations and experience, plus other low trust factors on the site[0], lead me to ditch your conclusion. Sorry if that sounds blunt - but the whole thing appeared to me to be a RNG lead gen for local car dealers who are short on inventory - the incentive is to give me a higher number so I become a lead for you.

[0] low-trust indicators I noticed: poor data curation - inconsistent capitalization (some all caps, some lowercase), multiple options for the same trim with nearly similar names. Rougher design than most modern sites. SEO Keyword stuffing at the bottom of the page. Leadgen pages for 3rd parties in general tend to be sketchy in general.