I have two HP 3478A 5.5 digit multimeters for sale. I bought these for a datalogging project and never used them.
The first meter has a calibration "certificate" from the seller that I bought it from in 2021. It was a measurement and test company, so I have no reason to doubt the numbers. It checks out and seems to work just fine. $100 + shipping.
The second meter is uncalibrated--probably due to a dead backup battery--and is in pretty rough cosmetic shape. Might be useful if you have a way to calibrate it yourself. $40 + shipping.
Willing to offer a discount and combine shipping if you want both!