About a year ago it was relatively easy to get a second hand nikon prime lens in those second hand camera shop. Nowadays, even a 50/ f1.8 also hard to come by. Does that mean that people upgrade their equipment while keeping their present stuff? or more likely that times are so bad that less people are replacing their equipment.

Seems like we could used the amount of second hand equipment in the store to indicate the state of the economy.

What does everyone think?