Why the F does anyone buy ASIC when you can move on with a GPU to new algorithms and keep your profits consistent?
ASIC resale value in one year 10% of original cost
GPU resale value in one year 80% of original cost
Don't think so? Look at the suckers on eBay trying to sell their Jalepeno and Antminers for a ton less than they paid already because they barely make $1/day. Look at 2 year old GPU prices on eBAy, min 80% of MSRP.
ASICs arrive when the seller is sure the difficulty is increased enough for it to be worthless for the SELLER to use them, so he ships them in a box to you.
Why would anyone bother with ASIC? Because power consumption is at least 10 times lower is one reason, even with Gridseed. Agreed there's no resale value - your profit is in what you hope to mine. When they are no longer profitable, pull the plug and toss 'em. Also, very much doubt you will get 80% back on your thrashed old GPU's - it's hard to move relatively new ones at the moment.