It's a struggle buying these store vanity sets.

I been trying to buy store vanity sets you know like harbinger and that but when it's time to buy, all of a sudden the counter goes to zero, you get none and then you see someone selling like 5 in towns !!! It seems like they got sniper bots or something, I dunno, but it comes to a point like why bother after waiting for over 3 hours numerous times and getting diddly squat. Sheeeeeeeeeeeeesh.

Nvm. I gave up after umpteenth time.

Answering to your post because none else did.
The bots was problem last year and the store items got sold out in blink of eye.
Now when you buy 1, you got cooldown for 10s or something like that before you can buy item again.

All you have to do is be quick.
Take confirm plat purchase off and refresh the page when theres 1s before items restock and just hit the buy button. Usualy you manage to get limited items.

Hopefully this helps.