Myles, Original Deep groove Blue Notes are going for very good money. I have a friend who is paying upwards of $5000-/ month collecting just these LP's. He has nearly 30,000 LP's and cannot get enough of them! My friend buys most of his Blue Notes on ebay and rarely gets outbid if he wants a particular LP.
I have known him to easily bid the amount of your example and much more!
BTW, he listens to these on an old AR turntable and with a Grace arm and old Dyna Ruby cart. Listens only once, then records the LP to digital and stores it. And you thought us 'philes were sick b'stards