We get asked a lot about those silver Evel Knievel Stunt Cycles.
In 2005 the Evel Knievel Stunt Cycle was reissued in several different sets by Poof Slinky. There was the Super Stunt Cycle set which came in a color full box with graphics. There was a also a some sets issued in plain white boxes like the Signature set witch included a Robbie Knievel Stunt Cycle and action figure along with Evel. They also issued an extreme set. Some of these sets included a funny car. They all came with certificates of authenticity. These toys are cool and now collectible but be careful if you think you are buying an authentic 1970's set. The cycles and launchers will be stamped 1972 (bike) and 1973 (launcher) but they were really made in 2005. One of the reasons people are spending as much as $300 for these is because sellers are passing them off as vintage 70's toys. Again, Ideal never made an all chrome stunt cycle.
Read the guide to reissue Stunt Cycles