Baader FFC info?

I have been considering purchasing this unit for some time. However, the
pricetag seems a little high and I have some questions maybe someone can
help address:

Is the size of the FFC 2" or 1.25"?

Do separate tubes have to be purchased to get each range of magnification,
or are they included?

Where is an on-line review available?

What firms in the US have it at a good price?

Thanks in advance,
Rod