You sure it's a 6.2L? I have a 2004 V210 with a 330hp 5.7L black scorpion. Plenty of power. I also have the stock ballast, but I don't think mine is anywhere near 500 lbs, maybe more like 300? Anyway, in general, I like the boat. I also bought it low hours and paid 23k for it about a year and a half ago. Mine had tower, bimini, basic stereo, front ballast, no other options really. I put in perfect pass and I think it's a must.
I don't consider minor scratches on the hull to be a big deal (although use this as an opportunity to talk the price down, and also be sure to check the skags, prop shaft area, and rudder mounts to make sure everything is kosher, it's possible they hit something). You can get gelcoat repaired for a reasonable price.
The downside is these mercruiser engines. The parts are really expensive. I just paid $57 for an inline fuel filter. The alternator I think they wanted over $400 so I ended up buying some other compatible one from someone else. The impeller change is more difficult than it should be, so it seems like some people let them go longer.
I think these are nice, sturdy, quality boats that sell for a reasonable price. Some people complain that they sit low in the water, but I think it's awesome. I came from a late 80s prostar 190 so I didn't even notice the lower freeboard until someone mentioned it.