I sell on ebay, I have a few stores.
I had a great deal at 1 point I bought 10,000 Stay Flat Envelopes 10x14
I cut them in half to make 5x14 Yes the First Class shipping with tracking is $2.45 for 3oz and $2.60 4-8oz
I also offer free shipping but my cheapest sticker I sell is about $8.00 and it is only for a certain type of group people
My average for my stickers is about $30 an order. I do the same thing with shipping tubes I buy 2.5" x 33" and cut them into 3 so for my windshield stickers I can roll up and ship in a tube for $2.60