There is no rule against selling accounts and most sold accounts appear to be used for signature campaigns therefore I do not believe that a sold account is a scam per say se. I would suggest that whoever left MarkMJ negative trust to change it to neutral if they wish to warn others to ignore previous feedback.
This is not a usual account sale. See:
https://bitcointalksearch.org/topic/m.12550819 . Negative feedback should not be removed.
Notice the high price because of the "free" stuff included? Who pays 1.2 BTC for a senior account they plan on using for sig campaigns
I haven't been around here lately but are prices for accounts really that high now? Here I was thinking prices would be dropping because of all the farmers.
Here is the post in case the above thread is deleted:
Hello
I'm selling this account + my
perfectmoney
solidtrustpay
paypal
payza
advcash
NO PAPERS will be included
All for 1.2 btc (negotiable)
Waiting pm if you want to know more details
The price is set by the market, not by the buyer's intent.
Someone who is going to buy a handgun with the plan of using it to rob a 7-11 is not going to pay a higher price for said gun then someone who plans to use their handgun to protect their family from intruders.
If his price is above the market price then someone who plans to buy an account to try to scam with will buy a lower priced account with the same ranking/trust level. The same is true for someone who plans to buy an account for signature campaign purposes. Both people will pay approximately the same price.
He is also selling some other accounts as a package, and it is possible that some of those accounts have some value as well, although I really am not sure.