I have a lightweight 9 point Orion Optics (UK) 200mm mirror cell in pristine (read unused) condition.
These mirror cells are the creme de la creme of mirror cells. Check out the website:
http://www.orionoptics.co.uk/OPTICS/...irrorcell.html
I paid 80 pounds plus shipping for this item (~$180, yours for $90)
Regards