not trying to be a ass, but u got the ******* riped off big time. i get high energy herts componet speakers (which is speakers, tweeters and crossovers) for $125.00, so some hert high energy 5x7 are way cheaper.
the pioneer amp, even if you got a 1500 watt 4 channel amp, there only like $100.00. the headunit is almost about the same price around $800-900 dollars, back up camera, i use to sell the night/day led back up camera for $50 dollars, u can get them on ebay for like $15-$20 dollars. cables are kind of expensive so 100 to 150 is ok. installation and taxes very by diffrent shops, but thats a lot of money what they charged u.