I have always shipped USPS flat rate..I want to start shipping in tyvek
envelopes but I don't know how to figure cost for these packages..Any
assistance appreciated..Thanks
I an no longer selling on ebay due to policy changes & PP is my payment
source so I am selling on other sites & a lot of my items can be shipped
in poly so because I am used to shipping Priority i am not familiar with
figuring regular mail..I will ch...