Ebay sellers help please!

[blanki]

I am pretty new to all the ebay 'stuff' Can I please ask re the plastic packets items are sent in, what are these called and where is the cheapest place to buy them? Many thanks!

here on e-bay Pretty cheap on e-bay itself, although you can buy them at the post office.

Hi - I use these - consistantly excellent service. The purple ones are cool!!