Amazon has BIC Xtra-Precision Mechanical Pencil 24ct for $3.88 (Reg $12.80) 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.