Decent GPUs Which Are Available?

[headzoo]

So I was thinking of putting together my own little GPU based mining rig, but it seems graphics cards are in short supply these days. Even the ones being sold on eBay are outrageously priced, because the seller's know miners are buying them.

I'm looking to mine some low difficulty scrypt based coins (not Litecoin) so I don't need an amazing rig, but I would love to at least break 500kH/s. There are a lot of Asus graphics cards available on Amazon which are not too expensive, but I don't know how to roughly calculate how many kH/s a card can generate by looking at the hardware specs. Is there a mathematical formula for that kind of thing? What's the limiting factor on how many cards you can put on a single motherboard?

My plans are more hobby driven than profit driven, so I'm really not looking for anything fancy. Also I don't play games, so the rig would be a miner, and nothing else, which puts an upper limit on how much I'd be willing to spend. Any suggestions?

[Craptsy]

Any decent R9 280x will get you 700 kh/s or so.

I'd go with Sapphire, Asus or Gigabyte - heard bad things about HIS, XFX and Powercolor.

[marcotheminer]

Don't bother mining man

[RileyN]

Don't bother mining man

Why? Altcoins mining is legitimate at the moment. Here: https://en.bitcoin.it/wiki/Mining_hardware_comparison you can find info about GPUs power. Compare it to prices and you will have your result