Well, I don't think the Blades are doing too bad on the eBay side of things. The still seem to be selling for between $4-5k even after the price drop. As long as you have the ability to sell a high dollar amount every month, both options(blades or USBs) could net you a little profit when resold. I've been thinking very hard about putting my last blade up for sale. Part of me wants to hold onto it and just leave it mining for years since I believe that Bitcoin is here to stay, the other part of me wants to sell it and reinvest the funds into either BTC or other hardware. Hell, I've also still got a 6x GPU rig, but that's just because I'm nostalgic.
Again, I'm auctioning those USB sticks to start at $1350, shipped Friday or Saturday if they're snatched up. For the forum, that price may be a little high, but for eBay, it's pretty low, especially if no one else bids on them.