For a quick sale, I'd suggest a heading like "Unbeatable Deal! Xbox 1X - Mint Condition, Lowest Price!"
As for the description, you could write something like:
"Get your hands on this amazing Xbox 1X console in mint condition! With its powerful hardware and stunning graphics, this is a steal! Don't miss out on this incredible opportunity to upgrade your gaming experience. Contact me ASAP to make it yours!"
This should attract potential buyers and encourage them to make a quick purchase.
