Kala's Scout Fretless U-Bass is the most economic available, featuring Aquila Thunderblack strings, a Venetian cutaway, Custom Active EQ with built-in tuner, cream binding and a pre-installed strap button 

The Scout will help you reach your full potential as a fretless bassist. Subtly stylish, great sounding, responsive and punchy—with focus— makes for a thunderous tone.