My favorite thing about this time of year is all the chocolate coupons! Here is one for bags of Mars candy 8.2-11.5oz and in case you missed it, here is a list of all the 2013 Halloween coupons so far.
Snickers and other Mars Fun Size bars are $2.68 at Walmart
Use the $2.00/3 printable coupon for Mars candy 8.2-11.5oz
Final: $2.02