For domains i find Openprovider.eu is pretty cheap imo, especially if you have a lot and buy in a package it is nearly costprice. Their DNS isn't great though, good enough for personal projects but not for business, would set that somewhere else.
Hmm, seems the good prices is only if you subscribe to their subscription. 5 euro a month or 50 euro a year, then the prices get slashed. Othewise their prices are expensive.
Agree! If you have a number of domains and can justify a membership, they Openprovider (NL) is a good option.
Some foreign extensions are quite expensive though. I happened to be looking into that yesterday, and Netim (FR) seems to be a good option for that. For the two extensions I need, they were among the cheapest with renewals.