Like I said in a later posting, five of the number being advertised are by two sellers.
Not all music, or all players require the use of a six string instrument; I think most players would actually get away with a three string bass and just four frets. I think Tony Levin had a three string Stingray built for him?
I mostly play solo, and I tend to use a lot of chords, so for me the high C string is really a necessity, as is having 24 frets. It all depends on what you do. I remember one of tutors at uni kept asking if I wanted him to remove one of my strings. He was d**k though, his thing was playing like Victor Wooten, totally different to my thing.