Single Comics are shipped with bag and board. Multiple issues and lots are NOT, they are shipped together in a larger bag for protection.
A word about shipping prices: Yes, shipping prices have gone up. Like most things, it isn't what it was when you were 12, and it won't ever be again. We'll get over it. The shipping prices I use are the discounted price I receive through Ebay. What little extra may accumulate is use to help offset supply costs. I will NEVER ship comic books via Media Mail - don't ask me to. This is a violation of USPS regulations. Graphic Novels/TPB are the sole exception as those are allowed. The sellers misrepresenting their packages to the USPS have already proven they are liars and cheats, what else are they lying to you about.