Second set of questions after reading your question again:
5) Did the LLC have any depreciation?
6) What was the method of accounting of the LLC?
These responses to these two additional questions could impact the character of your gain; will not change the overall gain (if you have a gain based on the responses to all the previous questions), just the character - capital / ordinary.
*A reminder that posts in a forum such as this do not constitute tax advice.
Also keep in mind the date of replies, as tax law changes.
