Hi guys i was looking at the watch, and the store owner said it was 100% real, and he'll offer refund if it wasnt. But im not sure, and was wondering if you guys can verify if it is authentic, and if its worth $500 based on the description. He said it is a SS seamaster 300m, but im really not sure, the description is kind of vague.Is the watch worth the price? SHould i buy it? Thanks.