I "used to" collect lights and have well over 600 the last time I counted, which was a while back.
I am laid off, so trading works best for me at the moment.
If you can give me some idea as to what you are thinking of, your interests, brands, lumens, etc., it would be a LOT easier...,
I just can not list 600 lights (although, it would be an interesting venture, LOL!!)