I paid $900 three years ago with an iffy display. Bought a new display since then so I have $1,050 into it but again I bought 3 years ago(display 1 year ago). My playfield and plastics are 9.9 (near perfect). Cabinet is scuffed up a bit though. Touch up's (size of a penny) have been attempted over the years. Also, mine is a reimport from Europe...I think that matter a little.
So....I am thinking anything under $1,200 for same condition that mine was at $900 3 years ago is a good price. Even LW3 had to appreciate some over the last 3 years!