I waited until the NARBC in Anaheim last year to buy a pastel, and I bought the absolute best darned one at the entire show. Normally I do buy online, but it's easy for image tinting to drastically misrepresent a pastel's color (for both better and worse), so I really did want see them and make the comparison in person.
That said... Oct 30 is pretty late in the season, so a lot of breeders will have already sold the best of their early-season stock. Sure, plenty of people have late clutches, but... if you do see a fabulous lesser or butter online before then, I'd go for it.