Seems that almost all vipers are limited editions....there were, what 100 VOI9 cars ? How about whatever year you choose and any specials, wasn't there 350 special coupes that were red and white and called last editions (???), there are only a certain many built, the add on from the sticker should maybe help on resale value, anyone could have plaques made that say one of whatever, not trying to start a "fight" when I think back over the years many are unique, how about red RT10's that have the gold wheels/badging ?? What about 3 were made ?? How do you add a "kicker" of extra to these other than supply and demand....VOI9 's may be more valuable because someone wants one and is willing to buy it, but the next model year build the engines were increased by 100 HP, this seems to add more value ????!!! I feel all Vipers are unique and valuable ! My $.02