The dealers have driven up the price and lowered the standard of "fully done up" games.
The last one I restored was Rod's (playfield only) and prior to that I sold me really nice CFTBL to Wotto for $3500 ish (2010).
Price depends on what you want done. You can buy all the ramps and a complete (licensed) plastic set as well as the playfield window and Swink's great mods. The Next Gen artwork is available. For a NIB Restored game - top of the market, you would be looking at $7000 ish. Dealers are already asking for these prices with bootlegged plastics sets, poorly made ramps and original pop bumper bodies !
You should be able to realistically buy a decent example for around $4000.