The gear was a singles wing. I filled it with air last night and it is leaking, so I am definately returning it. I will give the shop the benifit of the doubt and assume it was an honest mistake. I don't really have a problem with a piece of gear that has beeen used once or twice and returned. I would, however, like to be informed. That way when I notice myself, I don't ask the question, "how new is this?".
If the guy at the shop said something like, "the only one I have in stock is a return. you can have this one now, or if you want I'll order a new one."
My response would be, "the return is fine."
This dive shop is a good one, and I'm willing to bet he just grabbed a demo by accident.
The reason I posted the original question is because of exactly what Walter is talking about. I want to be able to return gear, so I have to accept that shops need to sell returned gear, on the other hand, I don't feel comfortable if I put an inflator in my mouth and it tastes like salt.