yep had the same situation on here with "NanoBen".
advertised a Reef Octo DDNW 150 with a maxi feed pump.
got the skimmer, pump wasnt in the box, pm'd & emailed him (the title for the pm's & email was maxi pup for my skimmer )for a month, with finally saying if i didnt have the pump by the end of the week i would file a paypal claim.
he sent me a Rio 180 and some tubing that wont even fit over the nozzle. his response was sorry he was mistaken and thought it was a maxi jet.
i filed a dispute with paypal and was told since he sent a pump then it didnt fit their criteria for a dispute. they said only if something wasnt shipped, not the quality of the item.
my response was that the pump wasnt shipped.
so now i have to call my credit card company and dispute that.
i am done with paypal. i will never sell anything on ebay again either, now they require electronic payments only (read paypal only, which they own), no money orders, no cashiers checks, no personal checks. AND they get to say how much you can charge to ship something.
and i have to finish my 90 days here so i can post negative feedback for him as well as leave positive for all the others who been great.