The low prices being offered indicate those coins were not mined on expensive 13GB+ machines using the public software.
wolf0 isn't the only one who can un-deoptimize a purposely bloated/crippled algorithm. We've seen this movie before, and sequels almost always suck.
or theres like 10 miners on the coin and low interest at this point and running a cpu costs pennies so its selling for cheap if at all.
Running a cpu may cost pennies but powerful 13GB+ systems could be mining many other coins, so there is an opportunity cost.
OTOH, if you have an unfair advantage from a private un-deoptimized miner (and credulous buyers standing by), it's pure profit.