I've been experimenting with gabapentin when used with xanax lately and it tends to potentiate the muscle relax side effects xanax can produce. I'm not 100% sure of this but I've tried it a hand ful of times the last 2 weeks and it does add a bit of something in the combination...I'll add I have no idea if this is dangerous to do and am not suggestion anyone do this, likely i said it was an experiment. If anyone with more knowledge on the topic please share. As for selling it it's not stuff that's really in demand and pricing would be quite low in my opinion, kinda like antidepressants.