I bought my Sony PRS-650 from Borders.com in the US, when they were doing a special offer. So, they ought be willing to deliver to a country that is a candidate for EU membership and already a member of NATO and the WTO, as they already deliver to the EU.
The 650 is outside your budget, but Borders are selling the 350 for $169.99 if your budget can be stretched that far. The 350 has a 5" screen, whereas the one on the 650 is 6".
Sony is renowned for its build-quality and it handles PDF files reasonably well. I use Copy & Paste all the time, with Linux, so you should be able to do the same if you use Windows. Both the 350 and 650 have E Ink Vizplex Pearl screens (ie non-backlit; non-LCD).
Look around for special offers. I expect prices will drop in the New Year. Good luck!
Addendum
eBay lists both new and used e-readers.