#319 and #320 are not expensive--maybe $15-$30 MOGNH. #319 is under $1 used; #320 maybe $10, maybe less. That's what I'm thinking--its been a good while since I got mine and I really don't remember what I paid, but I know it wasn't much. #319 & #320 can get a bit more expensive if you get into the sub-listings: #319a thru #319q and #320a through #320d---some but not all of these are a bit more expensive. When you learn to recognize them, you might be able to pick one up cheaply. I picked up a #320d on cover a little while back---that's a $500.00+ cover and I paid less than $30.00 for it.
