2001 GMC Savannah 3500 box truck

I bought this 2001 GMC Savannah box truck from a neighbor a month ago with bad fuel injectors. I replaced the injectors and now I’m told it needs the rest of the fuel system which is at least $350 plus labor. I believe the mechanic. He’s an honest guy and not a big dollar operation. I’m just out of money. I’m into this thing for close to $2000. I’ll sell it for $1200 and take the loss. If I don’t sell I’ll pull the box off and use it for storage and scrap the frame and motor. Its got a brand new fuel injector assembly. The interior is grubby but the seats aren’t torn. Its got 173,000 miles on it, but it ran just with bad injectors. No leaks that I could see and the box is tight. Truck is in Amherst at the repair shop.Thanks for looking.