Amazon offers Prime members The LEGO Movie Videogame for Nintendo 3DS for $14.98 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 by $5.

It's also available for PlayStation Vita for $14.99 with free shipping for Prime members. That's another price low, this time by $8.