second hand

Hello! I'd like to pair my vintage receiver with a pair of modern tower speakers, but have a low knowledge base where it comes to non vintage speakers. My current setup is a Marantz 2325 reciever (125 w into 8 ohm ) driving a pair of AR11 speakers, drawing from a turntable, CD player, and...

I've found a good deal (maybe too good) for a pair of R3s but I'm anxious about buying them since I don't want to get fooled... The seller states they are 2 yrs old. Are there any ways of testing them to make sure everything's ok and nothing is broken with them? I don't have a mic and know...