Amazon offers Prime members the Nintendo Waluigi amiibo Super Mario Series Figure for $6.39 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $4.98.) That's the lowest total price we could find today by $3, although we saw it for $2 less in January.
Also available is the Nintendo Daisy amiibo Super Mario Series Figure for $7.14 with free shipping for Prime members. That's also the best deal we could find now by $3, although we saw it for $2 less last month.