K30 values??

[steves1967]

I found a 71 or 72 Chevy K/30 sitting in the storage lot that I keep my travel trailer in, the fender badges say 350, it has a 4 spd, tach in the dash, and bucket seats, and roof marker lights. Hasnt been registered in 10 years and looks like it's been sitting that long too. I'm going to try and get ahold of the owner this week, I dont want to insult the owner when I make an offer to buy it, is there anywhere that i could figure what it might be worth? I was thinking $1500 or so. I'm not even sure that it runs....