have a lamp and want to find out what it may be worth, but can't find anything, anywhere...

this lamp is about three and a half feet tall from base to top of shade. the bottom is a plaster (or plaster-like) model of the launched vehicle. the shade shows several images; one is the orbit expected, another is how the vehicle will separate, one is the walk itself. the letters USA are emblazoned on the second stage with an american flag.