Oh man, sad to hear... But as Anhelenuk said: keep it, you know what you have fixed, spending a "little" more to fix the rest and you are fine. If you sell it now, you won't gain much money i suppose and then you will have to buy a "new" car with new problems...

Trifecta on a pre facelift e53? No xdrive, so maybe "only" an ABS sensor or is that caused by the ABS pump?