Ebay auctions by Andy Mirski- sells Polish Coins and Coin Books Chicago area.
amirski@prodigy.net

Ebay Auctions by Ignacy- Polish coins and stamps.  Toronto.
ignacy

Ebay auctions by Stefan- sells Polish Medals, coins, stamps books and more.  Toronto.
jon93
 
Ebay auctions by
Lexus81
 
Good medieval coin selection, including Poland.  Belgium
http://www.elsen.be/

Ruscoins Auction (some Polish)
http://ruscoins.freeyellow.com/Auc7tob.htm

Allen G. Berman (Polish and world old coins)
http://www.bermania.com/index.htm

Frank S. Robinson Auctions
http://www.albany.net/~fr/a.html

Collector from Poland
http://www.free.com.pl/piotrna/

Cherystone Auctions- First class stamps, but expensive.  USA.
http://www.cherrystoneauctions.com/auction.htm

Collection of dealers stamps of all countries.
http://www.zillionsofstamps.com/

Maps
http://feefhs.org/maps/indexmap.html

Russian coins-early history reference only-nothing for sale.
http://www.ece.iit.edu/~prh/coins/PiN/ecm.html