"It is a good reason to use mail service with tracking number which the
buyers and eBay can see where the item(s) are going." For some not for
others. Sell a $8.00 item that can ship via a letter for $0.85 and you
get sales. Charge $15.00 to ship it ...
A search for "resperonics cpap mask" yields lots of results:
http://www.ebay.ca/sch/i.html?_from=R40&_trksid=m570.l1311.R4.TR12.TRC2.A0.H0.Xresperonics.TRS0&_nkw=respironics+cpap+mask&_sacat=0
The rules are clear...exactly as Pierre stated. That being said they are
not always properly enforced. Someone I buy ink cartridges from mails
them letter post always even tough they are at least 3 cm thick. His
feedback is in the many thousands and ...