How to get rid of 2012 Fiesta

Hello all. My wife just bought a new (used) car from a dealer. She didn’t trade in her old Fiesta

It’s a 2012 1.2 petrol with 250k km on the clock. NCT until end of August. It drives well but has a bit of body damage (scratches) and the check engine light has been on for years due to the cat converter. It has never had an issue with emissions at NCT time however.

How would I even get rid of this? What might I get for it on DoneDeal? It’s pretty beat up but drives away fine