HI,
I would say its a tough call.
Have you shown the stud?
Is he a CH or have points?
Does he have CH as parents or GP's?
Does he have any outstanding limitations/drawbacks you can see.
Has he breed before, and if so the results?
You need to decide how you want to handle this for yourself. Its always a gamble on the stud when accepting the pick of the litter as payment because; is the bitches owner honest, has the bitch breed befor, whats the bitches line?
Also, there is several doggy-VD's you need to be worried about if mom is an active girl.
ONE thing is have an IRON clad agreement, and you host the mating. Do to
http://dianesyorkies.com/stud.htm and look at our agreement.
Modify it as you need to to fit your situation.
ONE THING, You CAN Accept the funds as ESCROW...to hold untill a viable pup is born and identified, then swap back the funds ($500) for the pup when its old enough. THIS allows you to have something "in your pocket" to assure your not going to be short changed, and you can sell the pup later.
Lots of options huh?
Good luck