To save on delivery confirmation (and if you don't mind having an extra program on your PC), download the USPS Shipping Assistant onto your PC. You put your name/return address and that is saved for all future shipments. And, you can track your packages easier (just click on "review shipments" and "check status" and the program will check with the USPS to see what has delivered) <--this saves time instead of typing in the DC # on the USPS website.
You can get DC for 19-cents, versus the 90-cents that the USPS charges for the green DC. I usually color my DC label light green (to match the one that the post office sells) to remind the post man to scan the package
NOTE: PayPal's shipping assistant has this same reduced rate, but I do not like to have postage pre-paid on the package as I have odd stamps lying around (before they had the forever stamps, so I've got odd 1-cent, 2-cents, and 4-cents stamps to use). Before, I had 60-cent and $1 stamps to use. Plus, I like to use the "Send a Hello" Disney/Pixar stamps.
The bubble envelope cost depends on whether I have to go buy a new one or whether I am re-using one that was already sent to me. Regardless, it's about 75-cents for an envelope (unless you buy at the post office and theirs is about $1.50-2.) This will typically factor into the cost for the shipment because postage is not the only cost for shipping and handling. This is usually factored into the cost because the seller had to buy the envelope (or some envelope to use).
But, here's a step by step:
1. Buy bubble wrap;
2. Buy bubble envelope;
3. Wrap each pin separately in bubble wrap (or you might be able to put more than one pin in some bubble wrap, depending on the type);
4. Place mailing label onto bubble envelope first (before you put the pins in);
5. Secure the mailing label in place (glue, tape, etc);
5. Place pins into envelope with note to buyer/trader saying who it's from and what it's for;
6. Seal bubble envelope with mailing tape;
7. Place DC label (if you didn't use USPS Shipping Assistant or Paypal shipping assistant) onto envelope (usually top, to the right of the return address label or to the left of the addressee label);
8. Place postage OR take to post office.