If you read the description, this spoiler is a continuously fretted instrument. If I had the extra cash, I'd scoop it up immediately.
 
http://www.ebay.com/itm/Alembic-Spoiler-4-String-Bass-Fretted-Fretless-Stainless-Steel-Fingerboards/161419548566?_trksid=p2045573.c100033.m2042&_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D26215%26meid%3Daeb3d0606adc458eaa92e4805fb6a123%26pid%3D100033%26prg%3D10926%26rk%3D1%26rkt%3D4%26sd%3D161419548566

This might be the same one being discussed here:  
 
http://club.alembicguitars.net/Images/449/29615.html
 
It's a pretty bass, similar to mine, same year actually, but the jury is still pondering the convertible fretless.