Reply to "book representing all 0 gauge manufacturers past and present value."

I use the auction site in the same manner as others have mentioned to get pricing info.  However, it's no where near perfect, particularly because there is an age out of completed listings.  So 1) you are looking at a snapshot of selling prices where a particular event can really affect pricing (the pandemic and closing of MTH are examples) and 2) for the rarer items, one may have not sold in the last XXX number of days or X years for that matter.