HItLights via Amazon offers Prime members the Multicolor LED Lightbulb with Remote for $9.46 with free shipping. (Non-members can spend $25 or more to qualify for free shipping; otherwise, shipping costs $5.58.) That's tied with our March mention and the lowest total price we could find by $7, outside of the price below. It features 16 colors, four transition effects, and more.

A close price: tinyheaven via eBay has it for $10.39 with free shipping.

Amazon Prime membership is $79 per year; however, Prime is free for college students for six months, and free for parents and caregivers for three months.