Looking to buy a bulldog for my sister, can anyone give me any tips on what to look out for and how much a bitch puppy would be , thanks

I cant offer any advice on what to look for but I think you can expect to pay in the region of £1500 for good pup .
Lel

That quite alot how come they are so expensive.

I know one of the reasons is due to the cost of veterinary care as bulldogs have their pups by C-Section .
If you go into Home at the Top of the page and then look for the Bulldog section there are some breed notes on bull dogs .
The following is information from the page mentioned ...
<<One of the reasons bulldogs are expensive to buy is they are very expensive to breed as unfortunately they often need a Caesarean section to deliver their puppies,and although they are good mothers they are also clumsy and a 24 hour per day vigil for the first three weeks by the whelping box is necessary to avert the very real danger of the mother overlaying the pups.>>>

Hope that helps
Lel