Cant tell you what it's worth but I have seen this machine 2 weeks ago when checking out a bride of pinbot this seller also had.
Too me it looks better in the ebay pics than it does in real life. It's a roughie but it work's so would be up to you how far you wanted to go with it. I know the seller was hoping for around the $1000 mark as he explained to me that if he parted it out (and he ships worldwide) he would get between $1200 & $1500.
A year ago I would have said don't touch it it's too rough but after seeing what Nino did with my Flash I now realize almost anything is possible with pinball restorations.