Amazon offers the Hershey's Chocolate 18-Count Variety Pack for $10.06. Order via Subscribe & Save to drop it to $9.56 and bag free shipping. That's about $3 less than you could expect to pay in local stores, although we saw it for a buck less last month. It features six Kit Kat bars, six Reese's Peanut Butter Cup packs, and six Hershey's Milk Chocolate bars.
Note: Be sure to cancel Subscribe & Save after your item ships to avoid being billed for future shipments.