Amazon offers its Prime members Matchbox Wrecky the Wrecking Buddy for $20.08 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, it adds $7.69.) That's the lowest total price we could find by $15. It features lights, sounds, moving parts, and can drive by itself.
Orders placed by December 22 via Prime will arrive by Christmas. (The deadline is today, December 19, for standard shipping.)