Please help me guess how much my boat is worth

[mada]

Here is a link to my recently overhauled 20 cc. I would like to know what it is worth as I am considering doing a winter project (23 footer cc)

Here is a link the gallery:

web page

I have no idea what it's worth now. I have 6k into the new transom and deck, wiring and all the other fixin's and my mechanic says the boat's engine is worth about 6 grand. It's a 135 optimax. Any input would be appreciated.