I was actually looking for a cheap Ethernet card, couldn't even find one on eBay.
Hello,
Ethernet card on AMIGA ? hummm 80/110 Eur ($70/$110).
The best choice: DENEB and all the 'USB world' will be open to you (HDD/Ethernet/Mouse/Keyboard/etc...). Becareful for your BUSTER version (7, 9 or 11).
Graphic card (like RETINA Z2 or PICASSO II) will be fine but it's very hard to find one for a cheap price

Welcome to the AMIGA 3000 world!
I'm trying to have Ethernet on my A3000 with an A2088XT + ISA NIC (8Bit only)...