I've tried P21S and it works well and looks great but I'm very partial to my two favourites so far:
Pinnacle Souveran, probably a little more than your target amount but sometimes deals happen,
and Victoria Concours, the red stuff.
The Vic. Concours comes in a 3 oz container as well as the 6 oz. (and a really large one) so one of the two smaller ones will meet your target price.
My summer car is Imola red, and both Souveran and the Vic. Concours are a dream to use and look amazing and I can't really tell which is which. The shine from either one turns heads and takes your breath away. Soon I'll try both side by side.
If it helps, I live just a few miles away from Vic. Wax, and will be heading down the road to get my container refilled.
-John C.