DOD FX20-B Stereo Phaser, Mint Condition. Has a wider range than a phase 90 (can be more subtle or extreme), and comes pretty close to the Sonic Youth Diamond sea "yoy-yoy" phase w/ the depth and regen cranked and speed set to taste:
$40 shipped and paypaled, or I'm lookng to trade for distortion or fuzz. PM w/ offers.