This is always a bit of a "should I or shouldn't I" scenario. I use used spokes all the time, however; I select which used spokes to re-use very carefully.

If a wheel has seen little use, is not badly out of true "as found" and the spokes are stainless steel, then I have no issue using the used spokes. The spokes are carefully removed, measured, cleaned, visually inspected and then packaged and set aside as a matched set.

Do I sell others a wheel set with used spokes installed? Yes, but only with their permission.

I have used used spokes for years and with little problem. Put another way, I have tested their use many times. These days, when people ask me to build them a wheel set, I offer the new spoke or used spoke option. Used spokes set the customer back about five bucks per wheel. New spokes set them back close to $60.00 for the set. Guess which ones most people choose?