You can fit 90-100 into a Priority Mailer for the 4.65. This is the cheapest way to go for that quantity. If you want to send them in quantities of 50 it is about 3.00. Now if you want 300 or more the best way to go is the Priority Falt Rate Box & it is 8.95 & you can put up to about 525 in there! (This is in the US...Canada is a bit more!)
HTH!
Julie