Depends on the MIDIboard version. It is easy to figure out simply looking at the front control panel, namely the logo and the parameter list. The later the version, the better.
On the v1, the MIDIBOARD logo letters are not filled in white, as opposed to the later models, and its parameter list has only two columns. On the v2, you see the logo with fully white letters and a parameter list on three columns (last column is incomplete). Finally, on the v3 the logo is like on the v2 but the parameter list has four full columns.
For the price to ask, it depends on the condition. IMHO the v3 in particular is still worth big money because of the design of elastomeric hammers striking a capacitance area, which offers incredible longevity. There is nothing comparable nowadays. Fatar actions fall apart after a couple of years. My v3 is 30+ years old and doing just fine.