You didn't pay extra. To option up a Kingswood with 4spd, GTS instruments, GTS wheel, N66 rims, buckets you'd pay more. HX Sandmans are essentially a Kingswood anyway with a few options, the only reason they were based upon base vehicle rather than Kingswood is the side and tailgate strips, the rest of the package is all Kingswood (chrome tail-lights, chrome scuff plates, grille, badge, door switches, trim etc).

Thats why I asked if they were dearer or not? If the kingswood was dearer then that makes sense to delete the stripes from the Sandman. Hard to know what the prices were when I was only 6 when they stopped building them!