Is buying a “used” subwoofer a bad idea?

+1 @lalitk  Buying a used sub would be pretty low on my risk radar to start, and if you buy a quality sub in good condition from someone with 100% positive feedback I’d have no concerns about it whatsoever.  In fact I bought my sub used using these parameters and it’s perfectly fine. 

Buying any kind of used audio gears, regardless of price, is just like buying a used car.  It all depends on: Who you’re buying it from (does the seller have a track record of integrity and reliability?):  Where you're buy it from (will the seller be held responsible for selling a not as described or defective item) and, of course:  How the item was maintained buy the seller (seller provides an accurate and detailed description of the item with photos attached).  All critical. All the above lessens the risk.  Happy listening.            

If you can verify it is an audiophile that is selling it... as opposed to someone that resells garage sale stuff, or buys trade-ins from audio stores. You can probably feel very comfortable. 

@ghdprentice Thanks I really needed a good laugh. Is there an audiophile registry...

If you can verify it is an audiophile that is selling it... as opposed to someone that resells garage sale stuff, or buys trade-ins from audio stores. You can probably feel very comfortable. 

@foggyus91 

No. You call on the phone. I have friends that do this. Within a minute you’re talking audiophile stuff and comparing equipment and trading bands that are great. It’s obvious. Audiophiles love sharing their knowledge and experiences. 
 

You get som grumpy guy that goes to garage sales or fences stolen goods, the jig is up in seconds. Likely you can hear him puffing on a cigarette.