In the grand scheme of things, losing that $750 is going to be peanuts compared to legal bills that you are very liable to incur.
First, you are going to have to answer to the police investigation... Better have legal representation there even if it seems like it's an "open and shut" self defense shooting.
Next, that person you shot is gonna have a family that's going to tell the press how "they were turning their life around" and you know that there's gonna be some assorted baby mamas and they all will have their hands out, looking for the check from the guy with the nice house and cars. That's going to take a good lawyer too.
$750 will be peanuts in that scenario. I'd say $10k would be getting out cheap.