I only replaced one side.
It was a bare axle, and i had them ship a bearing with it.
I had to press on the new bearing and new wheel studs. I suppose you could re-use the old studs. The bearing was a Timken. The studs I got at NAPA. I re-used my seal, since it was still fairly new. I don't recommend that, but I need a reason to replace my brake shoes anyway

Total from WCD was $142.69
I paid no extra for the better axle they shipped later.
That breaks down to
102.13 axle
21.75 bearing
18.81 shipping to NC from CA

5 studs were about $6
I have a press so didn't have to pay to have the bearing pressed on. That usually runs $20-$30 I think.

Add about $40-50 for the "Tom's Axles" brand if you get it through WCD.
I would go to tomsdifferentials.com to see if you can get one direct from him.