https://www.shoptagr.com/
Who uses this site? I have for the last year I think. When you see things you want to buy online, you "tag" it & it's supposed to alert you when it goes on sale. They're not perfect though. They don't work w/ all online retailers & they don't seem to tell you when things are running low on stock. I've seen things go on sale & even sell out & they never informed me about it & I've told them on a few occasions so they can work on getting on top of things better.
I'm really, really mad about a Henri Bendel bag I wanted, but by the time Shoptagr told me, it was not only on a much cheaper price, but had completely sold out who knows how long ago. I really, really wanted that bag!!!