You won’t get an insurance company to increase the value they assign your vehicle by finding comparable vehicles, you need to pay for an appraisal from a licensed appraiser which usually cost around $500 but in most cases if your appraisal ends up being considerably higher than what they were offering, they have to pay the appraisal fee plus the difference. I built a Harley that I had $50k into plus my labor and an uninsured driver totaled it. My insurance wanted to pay me for a stock bike, about $23k. I paid for an appraisal , he valued it at 53k. I had every receipt so it helped my case. They hired their own appraiser- 47k. They compromised at $50k plus my insurance paid the fee. IMO it’s not worth it unless you’re talking at least 5k because it drags it out months and you might not end up with more money.