Trading Tip Mail securely. Putting a card in a penny sleeve and throwing it in a floppy envelope is not secure. You might laugh, but it's happened to me more than once. Needless to say, that was the last time I traded with them. On the other extreme, don't wrap cards so tightly in tape that they can't be accessed without damaging. You should leave some breathing room to let the cards out. You common sense when you send card. You don't need to wrap two common cards in a refrigerator box to make sure they arrive safely. For a couple of cards I put them in a top loader with a piece of Scotch tape across the top so they don't get out. I also fold a small tab on the edge of the tape so that it peels off easily.
Many people have different methods, which is great. Just make sure when you're getting cards ready to go that they're secure and stiff. If the trade involves some more valuable cards, bubble mailers and insurance is recommended. - tip from www.tradercracks.com
Frequently Asked Question What are parallel sets? Any time the general card design and photo of a player is re-used with a significant shift in technology on the front, the set is known as a parallel set. This means that it parallels or mirrors the look of the regular set, but it is being enhanced. Parallel sets are generally done through various printing technology, different paper stock, additional layers of foil or other items that make the cards look more rich.
These cards can also be crash numbered (Please see What is Crash Numbering? section) to add even more value for collectors.
Fast & smooth.
Glossary Term Security foil - The Upper Deck Company uses a special trademarked hologram foil stamp on the backs of cards to verify that the card is not a forgery and is, in fact, printed by the company.