If you don't find the price you want close enough to pick up, check these out.
These guys are reasonable with their shipping charges.
http://www.aimsurplus.com/acatalog/copy_of_7_62x39.html
Shipping for 1000 rounds to my zip code is $16.00. That makes the total cost of the Wolf ammo $3.71/20 rounds. That's cheaper than I saw it at the Harrisburg show.
I don't know how these guys are for shipping, but their advertised price seems OK.
http://www.classicarms.us/htm/ammunition.htm
If you find the "Good deal of the week", please share the info with the rest of the class.