You'll almost certainly pay more used for an opti-mod V3 compared to a regular V3. If you don't want the opti-mod and will just be returning it to Grace to get the word clock back, you'd be better off looking for a plain V3 to begin with.
Just curious though, why do you want the word clock? Not too many concert tapers want to do multi-source mixes to begin with, and not too many pieces of gear out there that will accept the word clock output of the V3. I guess the AD500/AD1000 have a word clock input, and I think the G-P ADC-20, but that's about all I can think of off the top of my head.