Sorry to hear about your troubles but before anyone goes blaming us NSW folk id be using some simple observation skills to observe that the OP's board dose not have the "S" symbol on the deck grip (assuming that photo is of you on your board) and that the one on eBay has a leggie string hanging off it, same as yours, but did you have the quad fin set up as well, like the board on eBay?.
So my question to the OP and to save anyone from being falsely accused,...... can we safely rule this board on eBay out as not being yours at least on the basis of the "S" symbol, if not the fin set up as well?