Been awhile since I`ve plugged DS Demos. Right now msoft99 has four demos up for sale: New Super Mario Bros., Yoshi`s Island, Mario VS. Donkey Kong 2, Mario & Luigi Partners In Time, All start at $29.90, and I`m not completely sure what the going price for DS Demos have been lately.
He also has a Resistance 2 Review Kit, which looks pretty awesome.
Packaged as a vintage war kit, it comes in a bisquit tin with a bunch of pamphlets, discs that appear like vinyl LPs and more. I`d love to see detailed photos and the contents of the documents with this.