yeah it does actually attest to the rarity of the items in question
but one thing is not known is how rare they really are while most typos and such probily do not get returned
but the ones with the different games maybe rarer and are harder to get a hold of because they were returned to the store and got destroyed
with any collectable theres levels of rarity. i was sad when i found more accounts of tony hawk 2 which i got from someone through a forum
then found one on ebay complete sold the incomplete one for half of what i spent on the complete one . in my small collection of this particular error type not counting the mass produced (Strider and jet moto 2). i think i own 3 rare ones two of which are one of a kinds. even for wrong games on the disc theres more common ones i have accounts of people returning them time and time again NHL 2k6.i know of 4 tony hawks . more them them seems to make them collectable Final Fantasy 7 with the floating i always seems to garner more of a price. (even though the game is dirt common and even the error is common)