Over the years MTH has issued the Up 4-6-6-4 "Challenger" locomotive several times in both Its Premiere (or scale) size line and its RailKing (or slightly condensed) size line In the past few months I've seen both models listed here on Choo Choo Auctions. I suspect you can also find what you're looking for on eBay. The problem with eBay is that descriptions are often misleading, the vendor may claim not to know much about trains and so cannot answer any questions about the item, etc.. With Choo Choo Auctions the descriptions are accurate, the pricing is fair, Charles Siegel answers any questions you might have quickly and honestly. If you're willing to risk you may be getting a "pig in a poke," or if you absolutely must have MTH's Premiere 2005 offering, and you don't want to wait very long for it, go to eBay. Otherwise, I've found Choo Choo Auctions to be a far more honest and safer place to make purchases.