That is a matter of personal opinion...I wouldn't take 95% of the COPO's out there for the green LS6 if one is judging rarity..It would be very hard to sell 1 of 10-15 "pilot cars," for 1 of 500 or so COPO's, and I have verifiable factory docs to boot along with what is customary on COPO's (POP, owner history). Especially when the LS6 is considered by many to be the pinacle of factory performance by Chevrolet on a regular production car (more HP, bigger engine, same ET's, etc.) during the "musclecar' era. Whether my description of "rarity" is yours or not can be debated, but we can agree to disagreeon certain cars. I think only time will tell once this current market "self corrects," i'm sure the guys in it making tons of money in 1988-89 never thought it would end either...but it did. There was a time not too long ago (a decade) a COPO was 30k and an LS6 was the same...maybe if we got back to that it would weed out the specualtors and non-enthusiast. The guy that truly appreciates the cars (whether he wants a COPO, LS6, or a 440 sixpack) could again own one and this topic would be pretty much pointless. As I've often said..if I want an investment I'll personally buy real estate or "tradtional" investments (blue chips) as they are more easily liquid and the "masses" will more easily see the "value." It is sadly a topic which will never be completely closed, as it is based on belief.