All of my Gargraves track is used and more than 20 years old. Bought at train shows locally. I only buy straight unbent sections and confirm that their is no plating that is flaking off or missing. Also check for divots or dents in the rail head. I like the versions with the lighter ties and black center rails.
I stay away from used stainless steel track, it is usually oxidized and a real bear to clean, it is harder to bend, and tougher to solder too. Plus I am not running trains outside.
The only issue I have with Gargraves is the flange hanging down past the tops of the ties that needs to be covered with ballast or painted.
