Fender® Steve Bailey Signature VI 6 String Bass Guitar    US $2,499.99

Fender® Steve Bailey Fretless VI 6 String Bass Guitar    US $2,499.99

Fender Custom Shop Bass VI Relic Vintage Specs Black    US $3,299.99

1963 Fender VI Bass SWEET SIX STRING BASS    US $4,495.00

60s FENDER BASS VI PICKGUARD    US $850.00

Fender Jaguar Baritone Custom Guitar 6 string Bass VI    US $995.00

The Fender Bass VI is sometimes referred to as a baritone guitar and sometimes as a six string bass guitar. It is a fairly rare bird. From 1961 to the early '70's less than 7-800 were made.
Both George Harrison and John Lennon used the six-string Fender bass on the White Album, Let It Be, and Abbey Road (McCartney stuck to the Hofner, Rickenbacker and 4-string Fender Jazz Bass.) Other notables known to have recorded using the Fender VI include Peter Green, Jack Bruce (Cream), Steve Kilbey (The Church), Eric Clapton (at least he owns one), and Robert Smith of The Cure, Listen e.g. to Smith's use of the Bass VI on several tracks on the Disintegration album from 1989, where the electric guitar only plays the off-beat chords, while the melody is played by Smith on a Bass VI. The result is a much spookier sound than provided by a guitar.