the last wedding that i was at, the main photographer gave me his backup D200 with the 16-55 F2.8 (or 50?) anywya, it was a very nice nikon piece and the camera was no slouch either.
this was a jewish wedding so i had to cover the bride side, pretty important stuff so i was more than just assiting, whenever there was time, he would send me out into the crowd to grab shots.
when you got 300 jews all dancing and yelling with people seemingly not giving a **** that you are trying to caputre the right shot, the zoom saved my ass many times.
could i have done it with primes? sure, maybe if i had 2 camera bodies on me, or if i just took the time to slow it down. But nowdays people want pictures pictures pictures!!
also, from my recent eurotrip, where i had a 35, a 50 and a 85 super takumar all metal primes.. plus a 16mm fish
after walking every day for 15km +, at some point i just really really wished i had the one lens.
having said that,
if you are going to sell yours, let me know!