A few weeks ago I spoke to an acquaintance of mine who said that his friend was a veteran glass blower which I found practical as I'd have someone to talk to. The thing is that the person started to offer me his old equipment for filling oxygen because it's something that I'd need. Didn't remember the specific model he mentioned, but he seemed a bit too pushy for me to accept on the spot and I say I'd be calling him back. Do I really need this or is he just trying to get it off his hands?