Sounds like a great find - maybe someone will comment on the brand quality, but if you need anywhere near 200 the pallet sounds like the way to go (assuming you have a transport option). Never can have enough fire brick around :)
Yes, that is a very good price for brand new insulating bricks. Even at 1.00 each. They won't work well for a feed tube, but for a burn tunnel and riser they are fine.
Mutual materials in Missoula is the place to buy heavy fire brick/ full and splits. Also best place to buy bags of fireclay.