Well... any competent shop can fix that, but it won't be cheap as was already said. And the unibody could be tweaked. I'd take that pic to a few shops and see what they say. But unless you are getting that car for under $1k I'd pass and even then... that's a parts car candidate or a drive as is candidate if it still drives straight.
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.