I just began playing Magic again after a 12 year hiatus.  I am not much for collecting and hoarding.  I would much rather trade for what I need and only keep the thing that I will use. 

I am a solid trader and have been shipping cards for years.    I usually only make trades that are valued at $20 or more and do take my shipping seriously.  All of my cards leave in Bubble Mailers and arrive with USPS First Class or Priority Mail.    I expect the same from traders.