Pee-wee Herman's bicycle, the famed MacGuffin of his Big Adventure, is up for sale for anyone who wants to be the villain forever keeping Pee-wee from his prize. Someone calling themselves the third owner (it's not clear if Reubens is included in that) has put the bike up on eBay, and as of writing this, you're just about a $26,000 bid away from owning it.
As you can see in the bottommost photo below, it's currently disassembled for shipping, but the seller assures us it's all there--even that rad cat head on the front. Plus, you also get an autographed photo of Paul Ruebens, a meta photo of him signing the photo, a letter of authenticity, Warner Bros.' spec sheet on the red cargo boxes, and the satisfaction of owning probably the third most famous seat Reubens has plopped his ass on. The owner has explained that they're only getting rid of it "because my family is getting larger." They've reached that point in their lives that all adults reach, when they must decide between kids and actual bicycle used in Pee-wee's Big Adventure and its accompanying paperwork.
If this red-and-white number is a bit out of your price range, I suggest as a backup this nearly-as-cool Diet Coke BMX.