interior makes or breaks sales. it's a hard line in the sand for a lot of buyers because of the known expense involved, let alone the hassle of chasing anything down should it be missing.
if your interior is tatty, or a half cobbled together amalgamation of modern and vintage bits n' bobs you can knock 5K right off the top. dash and package tray is all tore up, headliner blowed out and the gauge cluster looking a mess? that'll take an easy few K right out of the pot, too.