That's a RESCUE not a purchase and that one is gonna cost you money.
Now the question is, are you in such a hurry to breed that you would be willing to pay for an animal in bad condition?
How about buying a healthy animal instead, even if that mean raising it up?
Also given the condition and lack of care since the beginning of the issue are you even sure that you are getting a female, and what other problems will you discover, this is the one you see there might be others?
Food for the thoughts.