LovelyHome2015 via eBay offers these LED Waterproof Shoelaces in 18 colors for $1.85 with free shipping. That's tied with our March mention and the lowest total price we could find by $3, outside of other eBay sellers. They feature three modes: steady, strobe, or flashing.

Note that this item ships from mainland China with an estimated shipping time of five to 10 weeks.