Bitterroot- Last year I did your idea and took the MCII off my 65ED and bought a 50ED body. My setup is awesome, and I love the performance of the 50ED with the MCII.
Then I purchased the MC 15x-30x eyepiece (or 20x45 on the 65mm) and put it on the 65ED to sale. This spotter is still for sale. I'm only asking $750. Not many interested buyers...I don't recommend that gamble. I basically own a +$700 50ED.
Yikes VANDAL.
That sucks big time. Have you considered pushing your luck with an auction on eBay?
Another gamble...