Ive found this lens for 1000euros, used, but in mint condition. It is in its orignal box and is sold from a reputable shop here in greece. Do you think i should bite the bullet? Ive seen the crea of a bokeh it creates and ive fallen in love! If i dont purchase this im gonna go for the new sigma 70-200 f/2.8 with the os built in. Thoughts? Ideas?