Currently a mere $27,000, this Heritage Auctions listing for Spaceballs (MGM, 1987), Group of (5) Spaceballs Action Figures are the real deal - that is to say, movie props, as there are no licensed action figures for the movie.
There's clearly demand for these, and if you really want them, this auction listing ends in two days.
In it, you get Barf, Lone Starr, Princess Vespa, Dot Matrix, and of course, Dark Helmet.