[Katapp]

I want to do a partial EB for a mobo and m.2, say only recieved mobo and no m.2. Also want to order a $400 cpu, then buy the cheapest cpu in person and return the cheap one say they sent me the wrong cpu.
The store comes in to mind are Amazon, Newegg, BH, and Best Buy. Obviously do them on two stores, which two stores have the best success rate?

If anyone have tips on SE gpu and aio's, I'd  appreciate it .