You should go with your instinct.
These people sound kind of shady. Did I read this right (this female just had her last litter at 9 years of age)?

That's just cruel.
I feel bad for this poor thing and hope someone caring and loving takes her in but IMO I think she would be a lot of work and I don't think i'd trust her around kids due to the fact she was "kept out back".
Poor thing
Don't worry you'll find the right one!