Depending on your Mac's pedigree, it'd be worth $1000 or so. Just a guess, so don't place too much faith in it. All the accompanying "fashion accessories" would boost the figure certainly.
If it's on a Form 4, and you're just a regular guy (not an FFL SOT, fer instance), if you take off for the Hereafter your spouse can pick it up on a Form 5 I believe without paying another $200 tax.
Best to contact the BATmen or go to their website for the straight skinny. Internet advice is after all, worth every penny you paid for it!
Cheers!
Redial