I have a friend with a lot of stamps from a stamp collection - probably dates back to 20s or 30s - which he wants to be rid of - I dont' like using them for postage, it's just too much of a pain for packages, but I know some of you folks ship out a lot of stuff - if interested, contact me off the list - I think he would need to sell $100 or so at a time. there are lots of full sheets, 1/4 sheets, all the stuff collectors used to want - but of course there is no market for collector stamps and he will die before he uses them up as postage.
It's actually pretty funny to go to the post office with a flat rate box covered with stamps on 5 of 6 sides.... but I'm over that amusement.
I will be visiting him tomorrow, so if you catch this and respond right away, I can put you in touch
don't reply to this, get my email from my web site below and contact me off the list