Gee, probably no one was buying them because they released 6 at a time at a ridiculous MSRP (granted, that first batch had the awesome steelbook + Fry's PM $16.99 deal, and the 2nd set came out cheap at Target week 2, but in general), with very few sales-- if you didn't get in on Deep Discount's sales I haven't seen another shot at Licence to Kill and MWTGG for under $20. The Amazon BF sale was amazing but that was a one-shot at well that hasn't been repeated.
OT: I am super tempted by this deal for the dumbest of reasons, it seems like the steelbooks are really likely to be damaged with regular handling (scuffing/denting) and I'm tempted to replace them since it seems like the SB sets aren't going to keep coming out... but I hate these fold out cases just as bad, but not sure when I'll see the movies for under $10 each again. I'd like to think by BF but it's quite possible they won't ever go on THAT good of sale.