If the cost of a new 255 is $254,601 (AI on the internet), then the $210,000 to $220,000 would be a good starting price.
One problem with items such as the spot lock trolling motor, might not be an accessory that many people would want in a Tom Cat. The AC makes the boat more suitable for Southern Climes than the PNW. Few would want the 4KW inverter and 400 amp hour battery (I understand that it will run the AC for a few hours). I am not saying that these are bad choices for you or for me, but that it might limit the buyers who were willing to pay for some of the upgrades.
Also Florida boats tend to be more difficult to sell--with people (often mistakenly) feeling that there is more degrigration from sun exposure and the warmer salt water.
Another question currently is what are boat prices doing? I have seen some very nice boats recently having radical drop in the asking price after being on the market for some time. There is a lot of uncertainty which is reflected in the Market. There is 4 season boating in Crystal River--where in AK it is much shorter. Also the location in Florida is less likely to sell quickly vs a C Dory in the PNW.
This appears to be a well equipped boat, and a good buy for a person who wants a "new" boat at a substantial discount.