There's an achievement for one purchase from BHH, but I think it would be great if there were tiers for 5, 10, 25, 50, and even 100 BHH restocks. Also, I don't know if this is possible, would it be able to be retroactive?

But den moar ppl will stalk deh BHH :(

Jk, actually I love this idea but only if it's retroactive. Otherwise I'd have 25+ purchases down the drain.