Could be a really good deal for you,
be sure to read the listing completely before buying.
I'll admit it's kinda tempting since it sounds like he just has a bad CMOS battery but you never know.
The fact I already have one keeps me from going for it so here it is.
http://www.ebay.com/itm/ASRock-Z77-O...wAAOSwQoFWPklG
Good luck!