What happens if your repossessed car was modified after purchase?

if it was me i would ask them to prove that the gauges were working before you bought it. and i am not sure but i think that any changes you make such as a new radio or new rims and such will stay so if you take something off i dont think u have to put it back. but i am not entirely sure. and another thing if it is getting or has already been repossessed i would tell them to get bent. it it was me.