: Haven't put one of these up for awhile but there is a sealed copy of the Trilogy Box Set on eBay.
: http://www.ebay.com/itm/A-sealed-copy-of-Bungies-Marathon-Trilogy-Box-Set-for-the-Macintosh-/151259090805?pt=Video_Games_Games&hash=item2337be8f75
The same seller is listing an OEM copy of Pathways Into Darkness, shrink-wrapped together with a Gravis gamepad and copy of "Axis: The Gamecheater(TM)." Don't miss the cheesy copy on the latter's box.
http://www.ebay.com/itm/A-sealed-Pathways-Into-Darkness-bundle-for-the-Macintosh-/161260591729?pt=Video_Games_Games&hash=item258be15a71