i sale dvds on ebay for about 7-10 bucks,pay about 25 cents for the bubble mailers and $2.80 for delivery confirmation with usps.dvds don't weight much.i've bought dvds from ebay sellers for a dollar and am wondering how is it that they made a profit,how did they ship so cheap and still get paid by paypal?is there a cheaper way?and i know this might sound stupid,but i just gotta ask,does usps have some sort of deal for monthly or frequent shippers?