I've got about 5 or 6 as-new FSA OS-110 and OS-140 stems. All fit 31.8 mm handlebars. Lengths are 110, 120, and 130 mm. Retail is $65 on the OS-110 and $90 on the OS-140.

Your pick of sizes: OS-110 - $30 each, OS-140 - $40 each.