Hi Steve and well done with the IVA.
If the car was specifically excluded from the IVA then it is yours to do what you like with, but I would inform your IP out of courtesy. He might think it strange you saying this so soon after the IVA has been accepted, and will expect you to buy something of equal value or hand over the profit to him for the benefit of creditors.
A HPI check is unlikely to show it being subject to finance if the loan was unsecured.
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
For further details contact me at
http://www.melaniegiles.com and view my IVA blog at:
http://melaniegiles.blogs.iva.co.uk