WTB: MFS extensions, 700 or 2000

[ear3]

Looking to add this to my arsenal.  So I'm wondering what the market is right now, and whether it is worth it to buy used or go new.  PM me if you're considering selling.

 

[ear3]

Bump.  I have the MFS400 now, but was looking for 700 or 1000 extensions.

 

[ear3]

Bump. Changed post title to reflect my need for the 700 or 2000 extensions to complement the 400 set and 1000mm extensions I already have.