Looks like a old Teraflex S4W kit. At the time it came out, it was one of the better short arm options for the WJ. Doesn't seem like a terrible price for the complete kit depending on what shape the shocks are in.
I'd try to grab the coils, a-arm spacer, and discos for about a $150. The control arms are a known weak link. The threaded arms can pull apart. Also, a HD adjustable track bar is a better option than the drop pitman arm and trac-bar drop bracket.