I'm definitely a cheapie when it comes to some things and even I now replace all those old sockets with new when doing a swap.
All the 'fixes' over the years with old sockets just don't cut it for me in the long haul. I do save the ones that aren't rusty though, and re-use the bare wire between the GI sockets sometimes (when I need a short piece and I can't find my new spool....)