If at all possible, I'd personally avoid having to use "auctionsites" or "second hand selling", because of the language/national borders and thus the usual higher difficulties in money transfer and security of delivery plus quality of product.
I have no (few) issues transfering money abroad, but it has to be to parties I trust, but dealing via auctions via foreign nations is not something I'd feel to comefetable doing
My preference would be actual webshops.
If that is impossible, we could find out something where you play middleman, but that would be placing some responsibilities on you though, which might cause you discomfort. However the amount of money requested at thoese sites (if successfull - as far as I can see they are auctiontypes, so minimum price, competition for items etc all can play an effect) is quite small, so I would think it would be relative expensive in administrative charges for me to get (you) others to do the trading for me and then having to move money to their accounts
I remember investiagting this sometime back when Georgi helped me aquier some books from England
Edit: But I'll try and look at the eBay sites you linked to, and see what I can figure out, although it seems localized to national sales only