I am thinking of buying one for my brother... Just kidding, Jim.
Mine came with two sets of leads the second set having all kinds of adapters with large, heavy clamps, pretty useless for electronics work. They were marked Agilent and I remember the price being like $240 for the set? I'd have to go back and look. It had two temp probes plus a temperature probe calibrator/tester that has a slider that allows you to set what should be the temperature and compare against your meter. I think it is just a variable resistor but I remember it costs like $230 at Zoro. It also had the extra calibration package which was an option at the time. There was a free calibration certificate and then this thick package with all the values and test results. The guy told me they gave them out to the top engineers and sales people at HP. Funny, the sales guy (like me) didn't know anything about it. He said, "like the field engineers are going to measure a voltage." He wanted $250 and I gave him $230 I think. He even drove it down from Sacramento to Sausalito. Nice guy. I kept waiting for him to change his mind while I was drooling.
The only thing I'm not sure of is the reading angle. My small Fluke, a 117, reads laying flat and I like that for working on open frames. The Agilent has more of an upright preference, at least mine does. I really love the two part leads though I know Dave didn't because they were longer.
As far as calibration goes, it seems to be still pretty close. This evening I was checking a Kelvin Varley divider for zero and was comparing it to my 3457a. I would say they were within a uV at zero. I picked up a Dial-A-Source 46A (love that name) and a Fluke 332D over the weekend. $75 per so I've been comparing all my meters. I have Glaucoma and cataracts so I usually need to have a backlight on my meter for contrast. I found these when I was looking for a u1253b with the OLED display after missing one on craigslist over the weekend.
I hope the start to show up and people report in.