Marquis 4 Polisi Converter

Hello and peace be upon you, and the mercy of God and His blessings Marquis 2004 black Polisi converter, long Canadian chassis GS Mileage is 400, recently inspected, ready for transfer, everything in good condition, I travel and come back on it, the engine loses about a quarter of a box of oil with each oil change, local chassis except for a crack in the bumper bridge, fully painted, for sale at negotiable price or trade