I have been running Aweber for a couple of months now and have a couple of lists hitting 500 subscribers (on the same account but for different websites). Then I realised that I could never sell the list with the website because you cannot move a list to someone else without losing a lot of subscribers. Which has got me thinking... Would it be best to have a separate Aweber account for each list, so that if I was looking to sell then I can just give the Aweber account to the new website owner? I just want to make the decision now, before my lists get too big. I can handle losing them now as opposed to later when I have even more.
The best person is to ask their support if you can transfer else having new account for each site is your best bet
You can't give anyone an Aweber account. The only way to give the people your list is to export them. Then they would need to import into their own account which means they would probably have to double opt in again. And as you mentioned, you will probably lose a lot of them. Best thing to do is keep the list for yourself.) Just cause you don't have the site does not mean you still can't sell them anything or provide them with good info...
I joined aweber the other day. It's a pretty cool service. I love it so far. I was wondering about importing some emails, but -- yeah, they have to opt in and that kind of sucks