Power Puller #8457 worth

Based on the catalog data provided, the Power Puller #8457 — LEGO Technic Set Value has a used resale value of $343.85 [1]. The second item, LEGO Power Puller (8457-1) (Technic), is currently unpriced in the catalog [2]. Generally, the value of LEGO sets is driven by the set's rarity, condition (especially if it's Complete in Box/CIB), and current demand. You can compare the sold comps against the current live listings shown on your screen to see how the market is acting right now.