Has anyone tried those replacement BIOS chips on ebay, and if so, any luck

My browsing computer is down for the count, and best i can figure it's the BIOS chip - after seeing them on ebay, i found mine on the Z97 board and it literally just pops out - so it's an easy chore to replace, physically

anyone have any experience with them?
 
thanks but these items are new, sourced from china so it's kind of a mixed bag
price is fair ($13) but the savings in time of not having to swap out motherboards is worth it and the wait if they work

i've got a backup board, still new in the box, and from what
they're going for, i could build half my computer