As a performing and recording bassist who plays a wide variety of styles, I couldn't get by without about four or five distinctly different basses at the very least.
As a collector who considers them investments and things of beauty, it's more about "how many basses do I want?" and the answer is always, "one more."
"That's right Mr. Martini, there is an Easter Bunny!"
WANTED: Vintage Hagstrom Concord in RED