The subject says it all.
I just saw an ad for a product that seriously appealed to me, from a store that I know, but when I clicked through to the product page it was sold out.
That's a lose-lose for both my time and the advertiser's money, not to mention my frustration with the store.
Do you take any measures to reduce the number of times you show ads for products that are sold out?
On Google, Facebook, other?