Amazon.com offers Prime members the Hot Wheels 20-Car Gift Pack, model no. H7045, for $10.22 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, it adds $5.67.) That's $0.51 per car and the lowest total price we could find by $12. It includes a random assortment of 1:64 scale die-cast vehicles.

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