I would sell them one by one and then buy a MET new in box. You can sell them for more than the price of MET as long as condition is avg for your games. Getaway and Centaur are very desirable. Make sure buyers can help you get them down the stairs.
New is like $5400 for MET but maybe you could get one for a little lower since there was a recent price increase. You may have to call around though to find one in dealer stock.
Good luck.