Conversation so far:
How were Drake's early mix tapes distributed?
Drake self-released his debut mixtape
How many copies of Drake self-released his debut mixtape sold?
Drake's mixtape was released for sale only, and confirmed to have sold over 6,000 copies
When did Drake create his next mix tape after his self-released debut mixtape?
In 2007, Drake released his second mixtape, Comeback Season.
Did Drake's second mixtape, Comeback Season sell better than his first tape?
Which single from Comeback Season was featured on BET before Drake was signed with a label?
Replacement Girl. The song made Drake become the first ever unsigned Canadian rapper to have his music video featured on BET
When did Drake sign with a label?
Drake was rumoured to have secured a recording contract with Young Money Entertainment on June 29, 2009.
How much money did Drake get to sign with Young Money Entertainment?
Did Drake make any mix tapes after Comeback Season?
In 2009, Drake released his third mixtape, So Far Gone.

Question: How well did So Far Gone sell?
Self-contained rewrite: How well did So Far Gone by Drake sell?