Actually, I'm pretty sure you CAN'T replace the word ASIC with GPU in that sentence about 60% resale value. GPUs have other purposes, ASICs do not. Stop peddling bullshit. Nobody's in the market here.
A 5830 today earns roughly the same hashrate as back in late 2010 when people started using them, when poclbm was released. And up until the ASICs started hitting, people were still mining with them. They weren't mining as many BTC as they were back in early 2011, but they were still hashing away.
People buying and selling GPUs and FPGAs here on the forums for the past 3 years care very little for other "purposes" besides mining. If you get 10% lower hashrate, it better be worth 10% lower unless it can do something extra, like use less power.
The only way ASICs don't have a resale value is if BTC drops to zero, and completely collapses. Other than that, ASICs will have a resale value, and people will buy them.