For its newsletter subscribers only, newegg offers this BYTECC Dual 2.5" SSD Mounting Bracket, model no. Bracket-35225, for $4.99. Coupon code "EMCJNNF78" cuts it to $3.99. With free shipping, that's the lowest total price we could find by $2. It converts one 3.5" drive bay to two 2.5" bays. Coupon expires October 10.

Need more than one? With the above coupon code, purchase two to five and the price per unit drops to $3.79, or purchase six to 10 and the price per unit falls to $3.70.