Some super-helful-mailing information! Courtesy of The Tf Collector's Roundtable.

When packing your items to ship, always take care to protect them properly. Even durable parts should always be packed in a padded envelope at a minimum. For breakable parts, always use a box. Small boxes are easy to find if you keep your eyes open. Mug boxes, Video mailers and old audio tape cases all work fine. If you are in the USA, in a pinch you can just fold a small Priority Mail mailer inside out. Yes, boxes do cost a little more to ship, but rarely cost more than a dollar or so and with parts as hard to get as they are, it's worth the expense. Take some time and invest in some good packaging material. Remember, tape is cheap :-)

(US only) When sending one or two parts that only weigh an ounce or two, you can save money by NOT using priority mail. Esp with the recent rate increase, it's still cheaper to buy a bubble mailer and use first class mail instead of priority. You won't even have to pay for bubble mailers after you've been trading for a while - just recycle the ones you receive items in. BTW, Common sense tells us it's cheaper to buy bubble mailers somewhere besides the post office, if you have a choice.

The inside-out Priority Mail mailer thing is a good one (I use it all the time) but you may have to wrap the box in brown paper before mailing it. Postal clerks can recognize one of these immediately and may refuse to send it or try to charge you the full priority mail price. Once it's wrapped, however, they can't really say anything.

Place small items in a sealed baggie or Ziploc bag before putting them in a bubble mailer. If the bubble mailer gets punctured or torn, the parts will be held in by the bag. You can even tape the baggie to the inside of the bubble mailer, in case of catastrophic damage ;)

Never use tape directly on chromed items. The chrome can come off with the tape.

Never send items in an envelope without sandwiching them between two pieces of cardboard. Letter sorters can and will get caught on parts and damage them or tear them out of the envelope.

If it's not corrugated, its CRAP! If you're sending something in a paper-thin box, you might as well not use a box.

Please be aware that parts trading will always carry some risk. There are rare occasions where mail really is lost. But by following the above guidelines, we hope to help you minimize these risks.