the whole shipping saga can totally be avoided if Tradesy ditch the mail kit concept. it's expensive and does no one any good especially with the to and fro, I remember that they even opened a kit distribution on the east coast to expedite the process. in this day and age of eBay and
Amazon if a seller can't figure how to send a parcel from point A to B, they deserve to be stuffed back inside the 1980s closet and stay there.
USPS works pretty well most of the times based on my experience but whenever there's a hiccup it tends to be major and time consuming, I don't need to tempt fate by using USPS 2-3 times in a single transaction before an item gets to the buyer. in my area, I can even schedule for free pickup during regular hours, so don't have to rush to post office. once in a blue moon, my carrier misses a pickup so I just reschedule for next day.