Many of us here are well aquainted with the benefits of having a quiver of skis. We have skis for hard-pack, skis for powder, etcetera. We all know very well that even if you only ski boiler plate, you still need a short radius ski, a gs ski and a speed ski.
However, some of us have made purchases to fill gaps in our quivers when we came across a good deal. For example, we may have bought a gs ish ski because we thought it would have better edge hold that the gs ish ski we had, only to discover it was a little too lively and not quite solid enough at higher gs speeds. Normally the solution would be easy - just sell it off. However, what if the ski is a lot of fun within its speed range, with lots of energy and pop when skied aggressively. What if the other gs ski is too good at somewhat higher speeds over rough terrain to get rid of (stable, dependable, won't fold up on you, lets you get away with some errors, and lively once up to speed), despite it's lack of ice grip? That's just one example, I'm sure you can think of others, or have others in your quiver.
Say you have three designated hard to medium snow skis all in the same 21 to 27 m turn radius. Instead of selling two of them, wax one for warm wet snow, the other for medium temperatures and the third for cold. Now you are able to get up in the morning and bring the ski with the right wax on it the moring of, without having to guess the weather in advance or scheduling early morning waxing.