i did some reasearch and here we go
airbags all 4-450
all the fittings-200
valves-400
huge air tank-250
engine driven compressor if the semi didnt have one-1900
4 link custom made from suicide doors-600
misc 4 link tabs and brackets of corse custom made-350
pressure switch-60
total-$3610 and thats just bagging it not to mention the cost of the semi plus anything i couldnt think of...lol