There are some good deals available but that depends on what you're looking for.
A flintlock gun is a very personal gun, since LOP and other features have to fit the shooter more than with other guns in order to be accurate with it.
There are some custom builders there, but usually with their very high end stuff (5K to 10K).
There is not anything there in the lower end/ semi-custom gun in a bigger selection.
Tip Curtis may have a finished piece and some pieces in the white in the about $1100-1200 range. And he has a lot of parts/kits as well.
And a gun in the white can be shot as well.
If you look for anything out of the ordinary, like a shorter LOP than 13.75-14.5"(standard for most kits), you are better off buying something beforehand, sight it in at home and just come shoot.
Now, on the primitive side you will find most all the accoutrements you need, a lot of them for very competitve prices. The first weekend is the time to be there, because some vendors only stay the weekend, because they have to attend their day jobs during the week.
I always make a quick round on both vendor rows, then act quick on the good and reasonably priced equipment. Usually, I spend my money on the primitive side. The work is generally better (more a hobby with some financial compensation and less for profit only) and did I say very reasonably priced. I have seen several real scrimshawed map horns which were sold for about half on the primitive side compared to laser engraved horns on the commercial row. The horns looked almost identical,but one was the real deal(scrimshaw) and one was fake(laser). Same goes for powder measures, shooting bags, forged vent picks, combination tools etc. By clever shopping I saved about $200 on accoutrements, which I used to buy other equipments. So it was more for the same :grin: