What's it worth? 1972 Duster \6 All original

what is a "rear apron" on a duster, do mean the tail light panel?. i paid 3k for my 73 duster, 225/6 3 speed on the floor, lemon twist w/ black stripe, bench seat, 76k original miles, original paint, 99% rust free ...and i only paid that much because the body is beautiful and rust free...