I know it's always YMMV regionally for individual stores, but the Target closest to me went to 75% off candy today, 11/5.

Combine with "a full cup" target coupon generator, and get more dollars off! target coupons good till 11/17!
http://www.afullcup.com/target-coupon-generator
gimme candy link for target coupons

My "a full cup" coupons would not scan, and cashier had to manually enter, took forever.
Below is the target website coupons. You can only print one of each at a time, but go back and print them again for as many copies as you want.

also, coupons on target website too, but you have to print multiple times
http://sites.target.com/site/en/supertarget/page.jsp?title=coupons%5Fspecials&ref=nav%5Ffooter%5Fcoupons
target coupons

$.74 - 12.6 oz halloween m&m plain or peanut + coupon $1 off 2 = net $.48 for 2 bags
$.74 - 9.34 oz fun size m&m plain or peanut + coupon $1 off 2 = net $.48 for 2 bags
$1.74 - 50 ct fun size m&m's mixed candy + coupon $1 off 2 = net $2.48 for 100 ct
$1.74 - 31 oz fun size mars mixed candy + coupon $1 off 2 = net $2.48 for 62 oz
$1.74 - 52 ct fun size mars mixed candy + coupon $1 off 1 = net $.74 (very nice coupon since $1 off 1, can print multiple times)
$1.74 - 39.1 oz fun size Skittles & Starburst + coupon $1 off 1 = net $.74 (again nice $1 off 1)
$1.74 - 43 ct funs size snickers + coupon $1 off 2 = net $2.48 for 84 ct

also a coupon for $1 off 90 ct snickers tub, I did not see that one, but usually ones in containers are higher priced and not a great deal.

I got 17 bags of candy for $11.33
Too bad all the manufacturer coupons that I had expired on 10/31, otherwise you could have used them with target coupons, and the stuff would have been almost free.
Good Luck!