I agree, at that price you should definitely make sure that the drum is unlined. It may be coated with "mild rust inhibitor" or something like that. If it has a liner in it, definitely avoid it. There's a place in North Charleston that sells reconditioned drums for around 30 bucks, but they nearly always have the liners in them.
Silver Smoker with all the typical mods, UDS, 18.5 Weber OTS, Smokey Joe