most obsolete chips are not cancelled. The green chip was issued in 1964, the red chip in 1970. No, 2500 is not super rare, or rare or kinda rare or slightly rare...scroll down to bottom, click on No Cash Value chips. Whomever sold these chips simply was not honest in the description

http://www.themogh.org/cg_chip2.php?id=NVLTCN&p=1010000000000#80