If you put Gecko drives in it that will reduce a £2600 conversion to a £1200 one.
These things are totally obsolete, they were designed in the early part of 2000 and have not been improved or updated at all. That's 17 year old technology.
There is a running thread on "Current Favourite steppers drivers " where the AM882's are compared to the EM806's where both of these drives are digital but the Gecko's are still in the analog era well behind even the old M752's