Hey, I might be purchasing a used surfboard tonight or tomorrow. It's a 6'10" Seven-S board. I'm gonna look it over before I make the purchase, of course, but what should I look for? I haven't bought a used board before so I don't know what to look out for. I'm only paying $150 for it, so I dont expect it to be in perfect condition, but what should I look for to make sure I'm not getting ripped off.