I'd say £150 is reasonable, anything over that is pushing it for me personally.
In saying that though, I believe that if someone wants to sell a pup for £250 or even more then that's their business. What I do not like and what I hate to see, is people lying about what the parents have done in order to sell the pups.
If someone breeds from something worth breeding from and gives you a price then you can't really argue, you either want to spend the money or you don't. But if someone tells lies about what the parents have done, even if he's getting rid of the pups at £50 a time, that i