Yes, a factory sealed copy of the PC version of Marathon2. Yours for US $25.
Now you might be wondering why do I need this... I have the Mac version. Well some of the levels are different for a start and then there is the box. Not your namby pamby triangular Mac box. No sir, this is your regular hardcore PC gaming sturdy square box. ;)
Now for all you collectors of Marathon memorabilia out there... if you placed all your Marathon boxes in a row where would this box be placed?