How much would my wow account go for?

It's a decent account. Not great, but decent. You might be able to get $150 or so for it, although that's on the high side. Your best bet would be selling it to friends or family. The only other site I would suggest is craigslist. Do NOT go with an account selling site. They use accounts for their own purposes and your account will most likely end up banned before it ever sells.