Buy it!!!!!! Why are you second guessing yourself?? Look at everything you are getting... 1 Wright Chromed 1" drive ratchet, Hell the new ones aren't chromed I do believe they are satin these days
2 Extensions
1 Breaker bar
A boatload of sockets, most of which aren't even used
1 Heavy duty metal box to hold all of your goods...
As a bonus you get a 3/4 drive set with its own box and sockets
All for $500! If I had it I would buy it! Sure, talk him down if you can, but even if it was $800 it would still be worth it.