Get the real thing, the original, the one. Accept no badly machined copies. Lol.
This is a RayQual/Kindai made, as sold by Japan Exposure/Cameraquest Canon FD to µ4/3 adapter.
Price: EUR 85
Shipping: EUR 9
Condition: Well, what can one say. It looks newish (but I have used it a lot). It's not like these things are worn out, unless abused of course.
PM me if interested.