Collector interest
Released in 1997 and exclusive to the Brazilian market through Tec Toy, Sonic Blast is the very last Sonic published on Master System, long after the console was abandoned elsewhere. That position as the absolute endpoint of the 8-bit line, paired with Tec Toy exclusivity, drives its value, especially on complete copies in the cardboard box. The game itself underwhelms, but its Brazilian scarcity and last-stand status outweigh that for collectors.