Venator-Class Republic Attack Cruiser #8039 worth

Based on the catalog data you have on screen, the Venator-Class Republic Attack Cruiser #8039 is listed with a used value of $274.99.

Since the second item, "LEGO Venator-Class Republic Attack Cruiser (8039-1) (Star Wars)," is unpriced in the provided list, I cannot give you a specific value for it. Generally, for LEGO sets, the final price depends heavily on the condition—whether it is complete, has all the original packaging (CIB), or if it is loose. You can compare the current live asking prices shown on the screen against the sold value of $274.99 to see if it's a good deal right now.