With a nice original cab, playfield, and backglass, a fully rebuilt KoD can fetch 1200-1500. If complete, and in need of mainly cleaning/polishing type stuff (so no need for new coin doors, legs, and all that), parts costs would be modest, even with flipper and pop bumper rebuilds. Around 150-200, tops for parts. If major stuff is needed to either complete it, or address cosmetic issues, then yeah, the parts cost can go way up.
But if it's got great cosmetics, and just needs a rebuild, there'd still be plenty of room at 600-800 even as a project.
It can be a hard title to find with a nice original playfield and backglass.