15k. The one that had the entire BBB collection of stuff (artwork all framed, bat, autographed memorabilia, full NOS replacement plastic set, etc) sold for 20k earlier this year and that was the nicest one I've seen. So 20k is absolute ceiling I would guess and it requires all the frills, unless you seek a NIB one (which there are a couple left but I couldn't guess what it would take to pry one away).