$20k (€14k) would rule out any european cats (€14k would probably get you a 2nd hand Tiger '08).

The closest thing I know is this 2nd hand M20 at €16.5 ($23k):
http://watersport.marktplaats.nl/catamarans/256998845-marstrom-m20-texel-2009-3-snelste-m20.html