If it's something like all-clad, aluminum bonded to stainless, then it should hold up forever unless it's been overheated to the point of melting.
I've got some that are going on 10 years, and they're essentially new, except for baked on oils on the (outside) bottom.
Cheaper stuff tends to show wear more, anodized aluminum exteriors wear through, nonstick fades after a few years, thin stainless dents.
I like restaurant supply stuff, I'd go there more often if I was closer to a store. I'd generally have no problem with used stainless stuff from a restaurant.
I've got some that are going on 10 years, and they're essentially new, except for baked on oils on the (outside) bottom.
Cheaper stuff tends to show wear more, anodized aluminum exteriors wear through, nonstick fades after a few years, thin stainless dents.
I like restaurant supply stuff, I'd go there more often if I was closer to a store. I'd generally have no problem with used stainless stuff from a restaurant.