Here is a real oddity to share with you - 2005 Boards member Sidecutter of online store Captured Prey sent us over these images of an item currently being solicited. The supplier deals in CHMS products, so we're assuming this is one of theirs.
As you can see from the pictures, it's a cage for Classics / Universe Ravage. But not just any cage, as it is based on the cage that the Autobots imprisoned Ravage in after he was caught in the pilot of the original Generation 1 cartoon, More than Meets the Eye. The set even comes with a key to match the cage, based on the one that Hound taunted Ravage with (and later conveniently dropped to let the Decepticon free himself all as a part of a plan to lead the Decepticons into an ambush)
The downside is this piece is likely going to cost $40 as it is made by hand from ABS sheet and rods. Which may well price many fans out of the market for this quirky bit of Generation 1 inspired fun.