I sent the dude a message saying "How does $450 plus shipping sound?" and got a "that's what I bought it for, so I need to make at least $100 on it. Can you do $550?"
Gonna have to decline that. From my research, it seems $600 + ship is most certainly a steep price. I get it though, the dude wants to make some $$$ off a bad deal.
MU Modular (Moog, Dotcom, STG, Analog Systems, and Moon modules), MS20 (x2), Microbrute, Electribes (EA-1, EMX), microKorg, AN1x, Nord Lead 2x, Blofeld, Alpha Juno 2, DX7, JX8P, Poly 61 (x2), Split 8, TR-505, Monotron Delay, Ace Tone FR-3, Paia Fatman