The ability to "legally" buy/sell almost anything in the game, including accounts, is one of the appeals of Wurm.
I have purchased accounts. With several dozen tiles to collapse in just one project, I purchased a priest to collapse tiles as it was a lot cheaper and more convenient to pay the going rate of someone else doing it. I realize this might anger some players who may have felt "cheated" out of potential large amounts of profit, the truth is, I would have simply moved on otherwise.
Also, I don't have the patience to do the grind to get a new character up to the level required to do this, so purchase was the best option for me. Especially while trying to do other work at the same time.
On a side note (sarcasm included free of charge):
If you want to start banning what you didn't do yourself, where do you stop? Banning account sales, deed transfers, gear ... did you craft, improve and enchant the gear you wear all by yourself?
Yes, someone can start the game and buy a high-skill character to play with. Where is the harm? I don't see any harm to others outside of PvP, where complaints arise when new players don't roll over and hand over ransoms of gear or praise.
But, more seriously, I would also like to see a method where character ownership could be tracked somehow and character transfers could either include a name change or a method of noting that the character has changed ownership. No, not sure how this could be implemented.