For a hefty $1500 on eBay, you could land yourself a rare Nintendo GameCube Development Kit, which includes an NPDP reader that allows you “to write beta software onto cartridges.” Auction page. Click here for first picture in gallery.
Up for auction is a Nintendo NPDP Reader Dev and Debug Machine. This unit looks to be in Excellent condition and is in perfect working condition. There is a switch on the side of the unit for US/JAPAN.