Fry’s Electronics offers the Antec Easy Swap USM External Hard Drive Dock, model no. 761345307529, for $10 with free shipping. That’s the lowest total price we could find by $13. Sales tax is added where applicable. It accommodates a 2.5″ drive for hot swap and an additional internally mounted SSD.
Of note, it’s temporarily out of stock, but it can be ordered at this price for delivery when available.