I've seen a few other people post this a few months ago, that their B & N were discounting their X-Wing stock. Just wandered in to buy a core set as a gift and found their entire X-wing stock 50% off. So yeah, I bought it all...
I've gathered that it really depends on the store manager and what they want to give shelf-space to, so it's worth checking out from time to time.
Good luck.