Ok I'm looking in the refurb store for an iMac. I'm looking to get a small business loan and this Mac will be used for all my eBay stuff so I don't need anything over the top but want something that will last me at least 2 years. I'd really love to get a 24" one but don't see them for under $1000(On here or other sites I've seen them that low). I want to try out that GarageSale app too for better organization as it will keep better track of all my fees and such. The two iMacs are pretty much same besides the hard drive and video card. I think a 250gb will be enough to store all my ebay pictures and logs for receipts, etc. What's the difference between the video cards? Thanks. Here's the 2 models I'm looking at.