The achievement were you sell 10,000 caps of goods,

I went to the dino gift shop sold my most exspensive gun and bought it back till I got the achievement.

It's kinda a cheap way to get an achievement but I wanted to see if it would work.

Could this get patched somehow?

Don't see why it would unless theres something special about the dino gift shop it'll most likely cost you more to buy the gun back then you get for selling it and besides it just says sell 10,000 caps worth of stuff so as long as you do that it does'nt matter if its from the same item or from a bunch of different ones.