Everyone in Poland knows Allegro.pl site, which is an auction website like Ebay.

But what happens, when one needs to find services instead of products? Pretty good website for this kind of search is Favore.pl. It is still a young website (1.5 yrs) and it looks quite ugly, but the database with services if a right size. You just need to give it a chance.  I truly wish them better programists and graphic designers, because the site has potential, but apparingly lacks good management.