Probably your best bet is to try selling them on Ebay. Do a search for similar product, and then check on the "Completed listings" button, to tell you similar items that sold, and for how much. That will give you some idea of what's being sold these days.
As for "baking" an alignment tape, I think that's pointless if it IS bad/sticky.
However, not every "old" tape needs baking. Believe it or not, some very old tapes play just fine. (Usually Scotch and sometimes BASF). It comes down to the formulation, and the particular batch of tape. Tapes from the 70s', particularly Ampex 456 and others (Sony Superscope, etc.) had bad formulations that ended up becoming "Sticky". The short story is that the binder that holds the iron oxide particles to the tape become sticky, and begins to shed and stick to everything in the tape path, eventually causing so much friction that the machine physically stops. Along with this, pieces of the tape can come off as well.
The baking process reverses the breakdown in the binder, but only temporarily. Once a tape has been properly "Baked" in a convection oven, the next step (immediately after it cools) is to play it (usually once) on a machine to retrieve its contents, converting it all to digital for archiving, remastering, etc. Within a day or two of the baking, the tape usually gets sticky again and becomes useless.
So, all that to say, baking an alingment calibration tape isn't really going to yield anything useful. (I wouldn't trust a tape that's gotten sticky to become a "reference" for anything. The point would be to retrieve the contents, which in this case are just test tones.)
If you've got a machine to align, you're better off getting a new tape to for this sort of thing. (And selling a "sticky" aligment tape - if it is indeed so - won't get you anywhere.)