About the "new" N900s in Poland: there are actually no new 24month warranty phones available. There are some which were swapped (when the previous N900 was dead, those people were given new ones - apparently never used them). Is it something that is worth catching or even in this condition is it better to stick with good-condition used ones?

/edit: and they're genuine - "MADE IN KOREA"

marmistrz, I would grab these replacement N900s with both hands if they are real. The last real ones I know about from a big seller were announced here from newegg for $300, I bought one.
The other thing to look for is the Mugen battery covers, I dont see those anymore after they sold them off $5/ea to double-Scud makers.