Hi guys, I am new to Macs, just got a PowerMac G5 2.5 ghz system from a friend. I've never tinkered with Mac hardware before and I know I need an Airport Extreme card. My roommate just bought one off of ebay and paid $38 including shipping for it. I went onto ebay and searched "Airport Extreme card" and it came up with a bunch of different model cards that were are LOT cheaper than $38. I am at a loss figuring out which card I should buy as I am not sure why my roommate decided to pay $38 for a card when I am seeing them for a lot less. Can anyone offer some insight? I don't need bluetooth and I am fine with wireless G instead of N if it saves some money. Would these be appropriate purchases? http://cgi.ebay.com/Apple-A1126-Air...emQQptZLH_DefaultDomain_0?hash=item5884fdeb58 or http://cgi.ebay.com/APPLE-AIRPORT-E...emQQptZLH_DefaultDomain_0?hash=item35a596a7e9 Thanks.