To those of you collection Rockman-related animation model sheets, it doesn't get much more rare than this. Currently up for bidding at Yahoo! Auctions Japan, a series of production sketches from the famous Rockman: Upon A Star anime.
Model sheets are sort of a middle ground item, quite common on a number of auction sites. However, Upon A Star sheets are quite a sight. As you can see, the sheets boast sketches of the show's characters; animators would use these materials as a reference when animating the show. The depiction of characters in a number of poses and gestures helps the designers to standardize the continuity of a character's appearance one scene to the next.
The seller is offering a set of twenty (photocopied) sheets, all said to be in great condition, at a mere 100 Yen (roughly $1.18 US). With six days left to bid, there's no doubt that price will skyrocket in time.
You can catch a peek of the auction here. If you want to bid, you'll have to go through a proxy -- a middleman service that's willing to bid on Japanese auctions such as Rinkya. These services usually require additional payments on top of the item's price tag so be ready to shell some dough. That said, feel free to have at it!