Acutally i'd said it's a combination of both...
Great deal, yes, probably a good price... maybe bad equiptment though..
Way to get busted, yes of course it's a possibility.. maybe not though..
I'd look for another option if at all possible, but if are really feeling good about your chances, go for it... You can find some good deals on EBay, and don't have to worry so much about it becomming an outlet to get busted.. As well as other places you can probably get what you're wanting for maybe a bit more expensive, but i'd say it's worth paying a bit more to keep your mind at ease..
I've kind of used this concept when i'm getting my personal stash.. Sometimes i will pay a bit more from someone I know is a bit more reliable/safe, rather than get the better deal and worry more about the quality of the bud/ safeness of the transaction...
Might of went off topic, i don't think so.. but that's my two cents..