Hi k422.. Well you are nagging them lol. Why not wait a reasonable amount of time for items to arrive before inquiring. Not all sellers print labels through ebay or remember to mark as shipped. A less than honest seller could tell you he has shipped , you are none the wiser.
PayPal allows 45 days to file an item not received dispute to recover payment should something go wrong. Always file no later than day 43 from the payment date..
http://pages.ebay.ca/help/buy/paypal-buyer-protection.html