Horizontal as well as vertical?
They benefit greatly from the addition of a riser block.
The vertical head, if a good Mklll is likely worth as much, or more, than the rest of it.
Not so desirable ad the 2B, which has more vertical table travel and stronger knee, along with easier adjustment (from the front) and larger table.
Check out completed items on epay? If it is local, it might be better than a distant purchase? 2A machines come up for sale more often than 2B variants, so relatively plenty around. Still a useful machine and likely better value than a (newer) chinese import. It is worth what you are prepared to pay for it.