Monorail Accessory Track #6921 worth

Based on the catalog data provided, the Monorail Accessory Track #6921 — LEGO Space Set Value has a typical used resale value of $215. The second item, LEGO Monorail Accessory Track (6921-1) (Futuron), is currently unpriced in the catalog. For the item with a known value, the price is based on sold comps, so you can compare this against the current asking prices shown on the screen to see if it's a good deal.