Join Date: Oct 2005
Location: Southwestern Ontario
FWIW, in my view a bike -- however great a 'bargain' -- is no bargain at all if it doesn't fit.
Given your stated height, and assuming the bike's geometry is as stated, it (that frame) definitely sounds not only too big, but perhaps even far too big. This is especially true of the t/t dimension when combined with the stated seat angle of 74.2; if it were a 73 or 72 s/a, possibly (though doubtful), but a 570 mm t/t (I'm assuming 'effective') with a 74+ s/a is a looooong bike.
If you were unusually 'long' in the torso (relative to your leg length) it might work, but doesn't sound like that's the case.
For reference, I'm just a bit shorter than you, with a 33" true (floor to pubic bone) cycling inseam, and I take a 535 to 540 mm t/t in a road bike (assuming a 73 degree s/a).