2006 Subaru Outback 2.5i

Been a very good car to me did a motor swap on it not sure on the miles but did a full motor re gasket including, bought a new car so I have no use for this anymore car does have an issue where when you turn it on it idles rough also continues when driving car turns on right away and drives but does that have that issue other then that I have no use for it and don’t have the time to fix it. Price it fairly firm.