Re: rg 560 bargain
Check it for cracked/warped neck, etc. but other than that... buy it!
Sometimes deals like this come along, you just happen to be in the right place/right time.
I picked up my first RG560 from craigslist for $150... and a few years later I was checking out a completely trashed (neck cracked, etc) flying V clone that I was going to buy for $20 solely for the case... when he mentioned he had another guitar and case he'd get rid of cheap... turned out to be a red RG560 that just needed a good cleaning... got them both for $100. That's an 89 RG560 with case for $80... best deal I ever got on a guitar!
That said, be leery of deals that are _too_ good to be true... you don't want to wind up with a stolen guitar. I've passed on a couple of "great deals" because a little voice told me something didn't add up (seller wants to meet in a parking lot, won't give you phone number or full name, etc.) Still, sometimes folks just want to turn that dust collector under their bed into cold, hard cash... The-Auction-Site-That-Shall-Not-Be-Named has made screaming deals harder to find but they are still out there.