i only have one Precision, with Warwick Red rounds on it - if I was into flats as well, I could conceive of needing two maximum. I know one BC member has 15 precision basses. My partner heard him say this and said "dont get any ideas about that...." - she tolerates four basses as long as they bring different things to the party.
However, if you earned the money, and its a good price where you're not being scalped, have whatever you like.