I rebuilt this fuel pump as a tester. I got all new Viton seals for inside. It was leaking before, and it's not now. I've tested it and it seems to be working fine. I would run it in my car (if I needed one) and just keep an eye on it for the first couple hundred miles.
It has some cosmetic damage from me prying it apart.
I'll guarantee it against leaks for 3 months, if it leaks, send it back for a full refund.
Asking $50.