I wouldn't be against prohibiting the sale of accounts here, but if you would send your money to a random person on the internet just because they're a Senior then any Senior member can scam you regardless of whether it is sold or not.
What's the point in buying accounts anyways? People should just build up their accounts honestly. I don't get why people would buy acccounts other than to scam people.
They're mostly bought for higher earnings on signature campaigns. Very few are used to successfully scam as there's more chance of your account receiving negative feedback before you could even scam with it.