Trident 3lb curved shoe model at Primary for $69. I bought two, put one in my 6.8 and one in my 18" Wylde. No complaints, much better than a tuned milspec trigger and they have full power hammer springs. About 1/2 the creep of milspec, but it's buttery smooth creep. I'm having no issues shooting good groups with those triggers.

My next suggestion is the enhanced PSA trigger or the ALG. Both are nice and can be even nicer with JP springs.

Hiperfire also has 3 triggers that are less than $100.

Another option is the Rise Fallout for $95. It's a cassette type drop in trigger similar to the CMC or Timney. The reviews I've seen are good.

There are plenty of options in the sub $100 category these days.