A buddy is thinking about selling his motor and asked if I was interested. What do all think would be a good price on a 2011-2012 mudbuddy 35hp 154 hours with the newer bps cross-over exhaust, carb, and boat doctor heads. Also has a good prop. Its an all around well taken care of motor.

$6k?
Kinda hard with no pictures

He just asked if I was interested and I was wondering what a good price on it might be. It pushes his 17x50 gator tax like 28mph he said. It's got a big blade prop and i think the 42mm carb. He said it would turn a hammer prop fine. I don't have any pics though but its a sharp motor.

I don't think it would turn the hammer prop.
But, go run it! see how you like it.
Anything is only worth what the buyer is willing to pay!