Not sure if "advertising" is allowed here or not, but I recently stopped mining on my 5870 and I'm selling on ebay if you fancy a punt. I mention it not so much to make money off the card from someone here, but I'd rather it goes to someone as a miner piece of hardware rather than "Joe public" who'd probably use it as a GPU. Most of them go for 70-80 euros as a guideline, but I don't have a reserve set.

Gave up the 5870 as a means to mine as the bitcoin/watt equation isn't great anymore unless you have free power. I did overclock the puppy and it was stable at 950mhz, so you should get good returns on it doing some non-bitcoin mining

http://www.ebay.ie/itm/151095564764?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

Happy bidding!