expensive is an understatement, when i was in trondheim last year went looking for a rosenborg shirt, was 60 quid.
When I went to Eindhoven for the match against Roda (Finished 2-3) I bought the PSV shirt and it was 70 Euro (about 60 odd quid). I got a 20 euro discount voucher with the matchday package we had to buy (I believe you have to do this because of the hooligan problem in Holland) but was still massively expensive.
The Phillips Stadion however is the only ground I have been to where there were heaters in the roof. I was sweltering in my seat and didn't realise why as it was only just over freezing that night!