>one might purchase a "used" car, not a "utilized" car

The other word we use is second-hand as in "would you buy a second-hand car from that man?!" I only thought about the strangeness of the word when a friend said that she wouldn't buy a "second hand house", a term I have never heard used (except, maybe, in the context of a brand new house which has been sold very soon after it is built). We don't say a "used" house either, maybe because houses don't get "used up".