[BruceZ]

[ QUOTE ]
Playing last night I made a deal that I think was good but how can I calculate EV+ on the spot?

I am heads up with 25,000 chips vs. 5,000 I offered the other player 2nd place plus $10 he accepted. It was a $60 buy-in with 10 players.

First paid $300 (so $290 after the deal)
Second paid $180 (so $190 after the deal)

I would say that both of us are at the same skill level.

[/ QUOTE ]

These numbers work out nice, so you can do this quickly on the spot. There is $120 on the line, and you are a 5:1 favorite to win, so your opponent will win 1/6 of the time, or an average of $20 of the $120. Since you only paid him $10, you made a good deal.