RatioI am a member of the Postmark Collectors Club. We donate our "extras" to the club for sale on
ebay to support our museum and club activities. Typically they are auctioned in alphabetized lots of 200.
You have a very good collection there! Pre-zip code and slogan cancels are usually in good demand.
As luck would have it, some PA postmarks are now being sold. Here is a recently completed auction:
http://cgi.ebay.com/200-PA-Postmark...em1c1c57a0fcThat averages to about $0.08 per postmark. That is on the low side. Considering the material, I would guess your collection would command a higher price. ($0.15 - $0.25) I don't collect PA or I would take them off your hands!

If you bundle them, you can cut down on postage. The $2.50 postage per 200 postmarks covers the cost nicely.
Of course you could always donate them to the PMCC.


Dan
