Hmm, I'm just thinking, what about the customs issue: if eBay says they come from Ireland (which would be OK since I don't need to pay customs from Ireland to Finland), but they are shipped instead direct from Hong Kong, I need to pay extra for the customs? Seems like this "Ireland" is a bit misleading there.
Anyway, as I have time, but less money :) I will probably set up an eBay account and start beating down the bidding path. Any hints, or is this pretty straightforward? I haven't been using eBay.
EDIT: aside to SinandGrin: I've found at least one difference in the offers for the 19'' touchscreen overlays, in that one particular brand does not seem to offer Vista drivers along the product. Now I don't know if this really is the case, but you can never be too careful!