Welcome iceman - I assume you're talking about the Axiom refurb store? If purchasing from Axiom you should have no worries. Sonically the unit should be the same as a brand new model of the same version/vintage. Your only quibble would be the cosmetics and if there are any blemishes that would bother you. Close your eyes and all is perfect :-)
They have a description of what they consider good vs scratch and dent. If concerned email or call Axiom and they should be able to provide more detail on the cosmetics, but again sonically it would be like new with a 2 year warranty.

Dan
On-Wall M5HP LCR, QS8 & EP500 in 7.1