I'm going to defend the vanguard. Its by no means the "worst" deal. 4k could be a high starting price. If it does come with frame, sticks and all, a guy could easily drop 4k on that package and I'll bet if you show him 35 benes he would jump on it.
Even if those are 10" oars, they are only $145 with wraps and stops plus $70 for each blade at cascade outfitters, for $530 total. So full retail for used oars? Worse than that if they are shorter than 10'