lajackson wrote:you could ask one of the clerks who has been around a while for an estimate
Chances are you'd get an inflated estimate. I had one ward tell me they were due for replacement and I told them they weren't - if they didn't believe me to check the manufacture date on the back of the monitor. (We got our GX270 and monitors in the same batch.)
It turns out they were remembering when they got the prior computer.
Your mileage may vary, but I find the wards have very selective memories. Like the ward that some how keeps remembering that I "stole" (with the stake president's permission) a replacement computer (a "cascaded" one from CHQ) and swapped it with one in the FHC. Well, if they really want their P90 back, I think I can arrange that.

(Way back then, it was MIS/FIS. Wards didn't need a Windows-capable machine, but the FHC was in desperate need of Internet-capable computers. Of course now, I think moving machines between the wards and FHCs would be frowned upon.)
But the point being is that I find wards tend to remember only things that are to their advantage to remember.