For example, one roll of Ilford FP4+ 120 costs 4.28 (and 3.00 if you buy 10 or more). At Photografica (in Denmark)
one roll costs 6.12. So, if you order enough even the shipping costs of 10 can be affordable.
I also see that VAT in Denmark is 25% and in Germany 19%, so that is a plus.
In short, decide what you're gonna buy, check prices + shipping costs on internet and go for the cheapest supplier, or - also important - support your local photo store.