I have bought 3 cameras off Andy too, being based in UK and worried on the customs charges on top, though Andy has methods of shipping to circumvent this. Recommended seller and reputable in regards to the warranty if needed.
Ah right, I will run them both to see if any issues as my previous 5231R-Z is on 2.460.0000.7.R, Build Date 2017-03-06 PAL.
For anyone running QNAP as NVR these are detected fine, the latest version of Surveillance Station now picks up the picture from the cams on the "Camera Overview" page now...
I got 2 of these today and both have newer NTSC firmware:
Software Version 2.460.0000.9.R, Build Date: 2017-04-28
WEB Version 3.2.1.446895
ONVIF Version 2.42
@EMPIRETECANDY many thanks arrived safe to UK "tax free way"
On my 253a just used internal IP, HTTP port. The camera shows under DAHUA though I do have the orange question mark when setup it still works, no zoom feature on this though.