That's the low end of the average price. Another good option is FTI Ratings as they offer the course in Denver and Dallas so their sims are going to be decent quality. (Google FAA ATP-CTP courses and you'll get a list of certificate holders authorized to provide it.) Looks like SkyWarrior in Pensacola, FL costs $3800 right now, think they use sims in Atlanta. That price might not include the written test so it's probably about the same as you found.