that's horrible. hopefully it will come back in soon!
Yes, it is horrible. Unless specifically stated otherwise, shopping carts should temporarily reserve the item until A) order completion, or B) browser closes. Think Amazon, a retailer that actually gives a ***.
It's also essentially irrelevant as to whether it comes back into stock at Newegg. I'm done with their BS for this build. I'll just go buy at Microcenter and break even on the tax given that their mobo and CPU prices trounce Newegg.