I just got some Polish Tantal 5.45 mags from Cope's.
For me this was the 1st purchase of used 5.45 mags.  While searching for the best deal, I saw typical low end prices were about $30 for used 5.45 mags.
No EE purchase for me as I usually can't keep monitoring...
When I tried fitment on my 104FR, all of 7 mags had an excellent fit.  Rear locking tabs were little tight compared to Russian polymer mags that I have.


Overall body - minior scratches & no major gouges



Front lugs - used but overall clean, a few had minor surface rust



Rear locking tab - Some had clean engagement surface, still with factory paint finish, several had minor surface rust



Mag base plate - finish wears, minor dings here & there, few had minor surface rust



Overall I'm very happy with these mags.  

They look good, you'll enjoy them!