I don't know how can you know if the account is sold from just the above listed info. I think you would most probably need to study there post history to identify the change in ownership.

No. Such forum data lists are not available publicly and also it is only released mostly to the trusted members of the forum for testing or other positive purposes.

For an example Vod got access to it for building BPIP, and you can get most info you need on his website here