Walmart offers the Kingston HyperX Fury Series 8GB PC3-12800 240-Pin Desktop RAM, model no. HX316C10F/8, for $31.99. Opt for in-store pickup to avoid the $4.97 shipping fee. That's $3 under our mention from January and the lowest price we could find by $5.
A few close prices: ANTOnline via eBay offers it for $32.67 with free shipping, NextWarehouse has it for $32.92 with free shipping, and Newegg offers a similar kit (with two 4GB DIMMs) for $31.99 plus 99 cents for shipping.