Maybe you ought to knock up a few more unicorns, a few people are in need of a unicorn at the moment
I added
my unicorn (HP 5370B) to my stack:
Missing HP patch (I still have some somewhere, have to find them), not cleaned at all.
Just changed the mains voltage to 230/240V and switched on.
The internal OCXO is a bit off* -the HP cal sticker is from 1987-05-20, only 33 years plus some days.
The next weekends are saved from possible boredom.
I was very impressed by the packaging: Strong double layer cardboard box and a second layer of double layer cardboard. Within that was the 5370B packed with 8 to 10 cm strong foam material held together by big bubble bubble wrap. Absolutely safe package, no real risk of damage through transportation -at least if you don't go over it with a tank.
*I'll check if that OCXO is bad -like in my HP 3335A -fixed it and re-set the working point of max. stability against temperature changes over several days due to the long settling times. Was no real fun along the way but the success felt good when it worked out right at last.