Niko, I understand what you are saying, and you have made some great points, but Hasselblad is in a different market altogether than Nikon or Canon. Hasselblad had a trade in program, but took it away a couple of years ago which they took a lot from their dealers, and from their customers. They lost business to Phase One who always has a very aggressive trade-in option, and were forced last month to bring it back. But Hasselblad and Phase both make a high end, high return specialized product offering them the ability to do trades whereas Nikon and Canon are high volume, lower margin commodity type products. Heck, they'd need to invent an entirely new department to handle the workload to resell, or recycle old cameras. A more manageable program would be turning in a Nikon UPC for an ownership loyalty discount.
Believe me, I love the idea, and would like to see it. Phase One and Hasselblad annual unit volume in the states is in the thousands, the program is manageable. Nikon unit volume alone is in the millions making it more of a challenge. Then again, there is doing what I did last year. I sold my old D80 on eBay for 70% of what I paid for it a year and half prior, and bought my D300. Now Phase does not even offer a 70% trade-in.