Experienced seller on Ebay, MTGSalvation, and was very active on Pucatrade back in the day with never a complaint of service.

I ship in toploaders/sleeves and secured carefully in an envelope unless it's a high dollar trade then it will go in padded envelope with tracking and insurance. 

I prefer to send continental US from Minnesota but if the deal is good I'll consider International.

Commander player only these days, but was a competitive player from Darksteel and "quit" around Shadows Over Innistrad. so know the ins and outs of making a happy trade. 

If in Twin Cities I will happily trade in person!