Dumb Question about cancelled postage stamps

[Sarah'sMomfrom PA]

Sorry if this is a dumb question so I apologize in advance!! Anyway, I have been diligently saving used postage stamps and sending them to Methodist Hospital in Philadelphia. I called there today and they no longer need these. I have an envelope full and was just wondering if anyone knows of any organization that could use these before I throw them away.

THANKS in advance!

 

[seashoreCM]

Are these common standard stamps or rare stamps?

If they are foreign or rare or of denominations not seen often, you might hang on to them a little longer and/or separate them into groups to sell on eBay.