Selling a set of 9mm, 17mm and 34mm extension rings for the Rollei 6000 series. (These also fit the AFi/Hy6 though I can't guarantee full functionality because I haven't tested).
The 17mm and 34mm are in excellent condition. The paint on the 9mm is a bit worn but it is still fully functional of course.
Price for the set: $995 + shipping
(Comparison with new prices at B&H:
Total: $1530 )