Here are some of the amazing items traded through eBay.com. These are already sold, but search the keyword "paddlewheel" to see what's available now.
A penny bank once sold on the Mississippi Queen Steamboat gift shop in the 1980s.
eBay description: This is a Memory Lane ashtray much like the Currier and Ives pieces produced by Royal China in the 50s and 60s. This ashtray is the same shape and size, but has the pink acorn pattern around the edge and a Victorian paddlewheel water scene in the middle.
Steamboat logo on a pack of asparagus.
Steamboat logo on a cigar box.
Drawing of the Delta Queen.
Ad for a paddleboat in Floridaland.
Hard Rock Cafe steamboat pin.
Model boat kit.
Surrealistic steamboat music box.
Pencil sharpeners, including one of a steamboat (foreground).
eBay description: an original 6" x 4 3/4" engraving on the Civil War theme of slaves heading to freedom, this time aboard a Federal paddlewheel steamer with all belongings while guarded by Union troops. The engraving is titled, Fleeing from the Land of Bondage--on the Mississippi River in 1863. There is a lot of to see in the painting, which was done by F.O.C. Darley, who captures all the details of the exodus. It was engraved by J. J. Cade, New York, and published by A. D. Worthington & Co., Hartford, Connecticut, who copyrighted it in 1887. The caption reads in part, "They were all going forth, like the Israelites, from the land of bondage to a land they knew not." It was professionally inset in the 19th century into a 5 1/2" x 8 1/2" page that was once included in a special edition history of the United States from the Compromise of 1850 to the end of Reconstruction, which had many earlier original engravings and autographs in it. This engraving could be removed from the page, if desired, by a professional conservator. (Image is bowed, not the page or print itself.)
eBay description: This Old English Staffordshire Ware decorative plate depicting the 220 foot Steamship Ticonderoga was made by Jonroth, Staffordshire, England for the Shelburne Museum in Vermont. It is 10 inches in diameter. The plate is in mint condition. There are no chips, cracks, or crazing.
A toy boat.
This isn't eBay, but may still be for sale at this URL: http://etsy.com