[CQ-Contest] What to do with old QSL cards?

[john at kk9a.com]

Maybe they are valuable? Someone is selling by 1984 KK9A/V2A card on ebay:
https://www.ebay.com/itm/144587245014?hash=item21aa1245d6:g:2W4AAOSwB0Bim2t9

John KK9A


K2SX wrote:

I have several (3-4) file cabinets filed with QSL cards going back to the
mid-1950s, including a large number of DX QSLs.  I seem to remember that
someone on this reflector had mentioned some place that takes these QSL
cards.  Would someone please remind me of whom that was?  Tnx.

73,

Dennis, K2SX