buying a dog

Have you or would you pay for a dog- if yes how much have you paid? i was really close today in getting a 8week old female sheepdog ..but the man wanted £80 for the dog.. but i dont have that much money to throw in one go- oh was gutted when i said 'no' cos he's always wanted to get one.. i even named her 'nel' but in the end had to say no ? my previous dog was free from the woman opposite our house..