I would like to offer media mail and priority mail flat envelope services in my listings but it seems that if I use media mail the flat rate envelope is not an option or if I use the flat rate enevlope then the media mail option is no longer available. I was wondering if it is possible to use both since I would like to offer the buyer a low cost shipping option although slow delivery time and the option for a faster delivery time but at a higher cost.
I thank you ahead of time for any and all responses.
Alan