Decisions, decisions

[Tink]

We're about a week from the due date for laradoodle pups. Right now the last thing on my mind was breeding again. So anyway, we got a knock at the door and there stands a man we've never met with one of the most gorgeous yellow labs I've ever seen. He introduced himself as the friend of our friend/neighbor and told us he'd been over here one day with our friend and saw Montana, and was wondering if I might possibly be willing to let him breed his dog to her on her next season.

He claims to have buyers already for several pups among people who know his dog and want one of his. He's been searching for a female and said he has some pretty strict thoughts on what he wants, so it's taken a while to choose one.

He said Montana fills the bill. He's bringing his pedigree by next weekend so we can compare and discuss details. His initial offer is that if I let him use her, he will take one of the more average looking pups for himself to let his male help him raise/train and he will bring me buyers for the rest of the litter. Other than the pup he takes, I supposedly get to keep the puppy fees. His motivation is the fact that his male is nearing 8 yrs old, (Labs have a life expectancy of only 9 yrs) so he wants another one like what he's got for when he has to put his guy down.

Our friend had told us about this guys interest in Montana, so we know that part is legit. His dog is a very nice calm fellow who listens extremely well and was very friendly to everyone here. He's willing to draw up a legal contract with us about whick pup he gets, his part in providing buyers, etc. It sounds almost too good to be true. Ya know?

So what are we missing? Is there a downside to this that isn't obvious to us yet?
What would you do?