What are the prices like as to the puppies of dandie-dinmont-terrier?

You could contact the secretary of the Dandie Dinmont Terrier Club When I bought mine 14 years ago they were £400/450 so be prepared to pay quite a bit - if you can find one! There isn't really any exploitation going on its just that they are rather difficult to breed and a breeder may purchase/rear/show several bitches and yet have very few surplus puppies to recoup their losses. By the way Dandies may be posh but there is no hyphen in their name :D