Is there maybe someone who has a 2GB mini-SD card?
I would like to buy one on eBay but I want to know some more info or experiences first.

It 2gb good for the E61 or should I better buy a 1gb card?

Buy a 2Gb card. These days the price is low, even for a 2Gb card. Imagine all You can do with 2gb;)

Is there maybe someone who has a 2GB mini-SD card?
I would like to buy one on eBay but I want to know some more info or experiences first.

It 2gb good for the E61 or should I better buy a 1gb card?

I've got a SanDisk 2GB card in my E61 and it works perfectly (it's the normal one, not the high speed one).

Do not buy a memory card from eBay, most of them are fakes (i think i've read somewhere, maybe on eBay actually, that 80% of the memory cards sold on eBay were fakes).

If you're in the UK, http://www.mymemory.co.uk/ and http://www.mobymemory.com/ are reputable online shop with very good prices. It really is not worth buying on eBay, the few pounds you'll save might cost you a lot in the long run.

Thx for the URL's
I live in Belgium and its expensive here, actually I went to some shops and they had only 1gb cards (or less mb)

Do you maybe know the shipping costs?

No metter where You live. Shop on-line!