Prop bet time. I have an edge here right?

[apefish]

talking sngs with my buddy and somehow the following prop bet comes up.
Playing at whatever level he wants (full nine seaters) he says he thinks he can ITM 60 percent of them over a sample of at least 800 but no more than 1K. In other words the bet would stop if at any point between 799 and 1000 he had a 60 percent ITM or at 1000 sngs played if he didn't.
We also are talking a buyout option if he doesnt want to continue past a certain point if he feels its unattainable. I told him I would offer 4-1 off the top of my head.
What it do BBV4life- without knowing much about him except that he currently is a losing sng player overall- do I still have an edge?
FWIW- he may or may not get interested in learning more about good sng play as a result of this- but I wouldn't count on it. Quitting seems the likeliest route.

yeah yeah- no serious bizness blahblahblah but I don't want to take this to a serious bizness forum.

Also, Danny Ocean is the second best thief I know.