Only the very old rotors with bad gaskets has a problem with corrosion
or water getting into the bearings. If you buy a new rotor, rob the
gasket from the new rotor, take it back to Lowes, tell them there was
something wrong with the rotor, get another rotor, then you will have
two rotors in working condition.

Oh, what a wonderful suggestion. Steal a gasket, and stick Lowes and
the rotor manufacturer with the cost of refurbishing the one you
plundered. Their shipping cost and personnel time will probably more
than wipe out any profit they made on the rotor you bought. They may
just junk the "bad" rotor rather than go to the considerable
expense of "fixing" it.

This is different than shoplifting, just how?