Wow help with my first deal

[Dan Favor]

I will be brief,

I placed an ad for inexpensive house. Got a call and he told me what he was looking for, area, price range ect. Then called my realtor to do a search of what this guy is looking for and I got a match and he wants to see it. The house is bank owned. If he wants to move forward What now! I want to wholesale it so should I make an offer and tie it up before I show him? Asking price is 78k he will prob go 60k what percentage should I try to make? HELP!!