I've had this for a few years, hardly ever used. It's in REALLY nice condition. I've used it on my Canon 70-200L just a few times, and it's played nice with the lens, WITH SUFFICIENT LIGHT. When light isn't so bright, it struggles a bit.
These seem to be trending at around $120.00 on the 'Bay, so I'm offering it at $45.00, SHIPPED CONUS.
I accept PayPal only, and I'll pay the fees there, too.
Thanks for looking!