Amazon has BIC Xtra-Precision Mechanical Pencil, Metallic Barrel for $5.97 (Reg $13) with free shipping on orders over $25 or with Amazon Prime orders.
The BIC Xtra-Precision Mechanical Pencil features 0.5mm leads for sharp, clean lines. This smooth-writing #2 pencil supports neat penmanship and is ideal for any type of writing or sketching requiring extra accuracy and precision. Lead advances easily with a quick click, and erases cleanly to keep work tidy.