On several occasions I've noticed people trying to sell their GOG accounts and I started to wonder how does GOG look at this. I quickly read through the terms of use, but found nothing about this particular issue.
Since games distributed by GOG are DRM free, there is a high probability [if not a certainty] that the person selling his / her account would keep the installs for themselves and continue to use them, while allowing someone else to access their account.
I know Valve doesn't approve of this when it comes to Steam accounts, even though in Steam's case, only one person can actually use the account.
So is selling a GOG account to someone, giving them access to purchased games, legal? Can there be a transfer of ownership or is this against GOG rules?

I dont think its allowed.And giving someone access to your account is definitely against the rules.

Well, you certainly wouldn't be allowed to resell individual games. It should follow that selling your account is also illegal.

Just to clarify, I didn't mean selling individual games nor giving someone access to an account. I meant selling an account and all the games along with it. Let's say you don't want your GOG account anymore, and you don't want the games either. Is it legal for you to sell the said account to someone, so that they can change the personal information, e-mail and password and keep it as their own.
I would really like someone from GOG to comment on this, so that we can get an official answer.

No. it is not allowed:
"GOG.com ("Service") is operated by GOG Limited ("GOG") and accessed by you ("User) that permits you to purchase and download digital content such as but not limited to video games for personal, non-commerical use.
Personal is the key word. You are the only one allowed to use the account nobody else. simple. So even allowing a friend to post on forum under your account is technically a violation of the agreement.
and my lead to cancellation of the account.
"These Terms of Use are effective until terminated. You agree that GOG may terminate your log in access to the Service, including your user name and password, at any time for any reason without prior notice or liability"
GoG has right to cancel your account at any time (like with steam it is not completely true. These are only terms not law. you purchased their games and cancellation of account will take the ability away. without notice i see with a good lawyer overrule of that term and making gog pay you back all you spent on games as well as your lawyers... :)
but it will take a while and it will cost you thousands of bucks.)
so realistic speaking if you sale your account and gog finds out it gets banned...
which will not really affect you

That's what I figured as well, when I read the terms of service, but transfer of ownership wasn't addressed directly, so I wanted to make sure. I think it's a good idea to have this stated clearly on the terms of service page, so that people won't complain they didn't know.

I imagine that the selling of accounts, while not something that's permitted by GOG's terms of use, is not something that the GOG team feels they need to spend much time or effort trying to address. People who don't care about rules are just going to give copies of the installers to whoever they want to. And for people who do care about the rules the games tend to be cheap enough that most will just buy the games rather than trying to go through the contortions necessary to arrange some kind of pseudo-sale. Basically any kind of focus on the resale of accounts/games by the GOG team would accomplish little and only raise unnecessary points of contention and possibly a small amount of bad PR.

To be fair, it's more of an honor system than anything. Getting caught is unrealistic, since you can use the service on any number of computers, and unless you go and tell everyone here that you got this sweet deal for your acc, I don't see how this can be tracked. But this is probably not a problem in the first place, people here have specific goals, and selling your account is rarely one of them.

Why would you want to...

Yyyyeah, because with this way of thinking, you are politely asking the team behind the service if it is or isn't all right. You're not a selfish bastard who would do it anyway, na - ah.

I can't say for certain but I am betting garage sales are legal, thrift stores are legal and ebay is not blocked where you live. It is probably okay. However, the only way you can be sure is to check your country's copyright act: http://www.sweden.gov.se/content/1/c6/05/67/65/ac3af6b4.pdf

Another clarification - If someone here is under the impression I asked the question because I want to sell my account, they're wrong. I asked this simply because on several occasions I've seen people trying to sell their accounts on internet boards.
@Darling_Jimmy - Thanks for the link, but that's not what this topic is about. I was asking what is GOG's standpoint on the account selling issue.
I fully support services such as GOG or DotEmu, and frankly, it pisses me off when I see people trying to sell the account from which they already got all the games. It would be nice to have some sort of a official response to this, and I don't see how it possibly could generate negative PR.

GoG team is a really small one, so I don't think they visit forums often. Can you just ask them via support mail? I think they would gladly answere you... Well, sooner or later that is, it sometimes takes them whole week. I think their service is getting really big for such a small group :D

Of course it's wrong, use your common sense. I'd inform GOG should I come across account selling or sharing.
Way too much assumptions in your post..
GOG would at least probably like to know which accounts are being shared and illegitimately sucking their bandwidth.