I bought a 1990 trailblazer for 550 and it was ugly and didn't run good so I fixed it up here's what I did
I got a high quallity 3m vinyl wrap on it blue and carbon fiber
I put in a new air filter
I put in a new spark plug
I rebuilt the fuel petcock because it was leaking
I put in a new battery
And I added a stereo with 2 chrome speakers handlebar controll am and fm radio an auxillary port a USB port and ad card port
So it runs great but its 2x4 and then today the reverse went out when I shift into reverse it just dies I have no idea why but I put a lot if work into making nice and I'm hoping I can make money and buy something newer so let me know your value on it or what you think

 

Honestly, with the shifting problems I wouldn't spend more than a couple hundred on it. With the problems fixed, maybe $500. As you said, it's 2wd. Good starter quad but wouldn't work too well up here in New England.

 

You probably won't be able to make any money on it. It may be something simple like a short in the reverse override button. I would try to fix it. You can get help in the Polaris forum.