Men in Black had the same idea when they did BotCon 96... and the fans revolted to the extent that it was deemed one of the worst BotCons, and their 1997 convention was a failure. (and it took them about 6 or 7 years to sell all their Onyx Primals)

These days though, yeah, 1000 figures of any size could command huge prices with the number of dedicated & completist collectors out there (with scalpers jumping on board as well to dry up numbers even more)