I bought both of these over the last 12 months from eBay. Both are in excellent condition, very bright (as new?) VFD displays and work perfectly. Both are upgraded to the latest available firmware. I have minor posts about both these on the forum if you search my posts.
I replaced the loud fan in the Agilent with a new, quieter, powerful and low power Sunon fan: MC30151V1-000U-A99, 30 x 30 x 15mm, 6cfm, 650mW.
Both units had the calibration seals intact when I bought them. Physically they are in excellent condition. The rubber surround on the Agilent has a few nicks on it (shown) and the Instek has some very light marks on the top from the feet of another instrument. Both interface to a PC as they should. I have had both of them open as I generally clean anything used that I get, and both were almost spotless inside. Just the tiniest amount of dust as if both had hardly been used, or used in a very clean environment.
The most accurate thing I have to test them is a 0.02% Vref from Maxim, and both meters read as expected within that accuracy.
My post when I bought the Agilent:
https://www.eevblog.com/forum/testgear/list-your-test-equipment-score-here!/msg2722342/#msg2722342
Prices, paid by Bank Transfer and posted UK only
Agilent 34410A: £450 £425 SOLD - Thank you
GWInstek GDM-8251A: £180 £165Collection is also possible in Rossendale, Lancashire.