Fair enough, though a multimeter at 16000 still strikes me as insane. We need a time machine to either go back to when this stuff was cheap or forward to when it will be cheap...
8.5-digit multimeters aren't easy to make or there'd be lots of them. Going back probably wouldn't help since in the old days, things we take for granted were expensive back then. Perhaps going forward yields potential for picking up today's expensive kit for less. However, if you couldn't come back, then you might want the then-available-but-too-expensive 10.5-digit multimeters.
GAS and DBA transcend space and time.
If we went back 15 years, nixie kit would be slightly cheaper on ebay, and if we were to go forward by the same amount modern kit should in theory be rendered cheaper as well. In theory, of course you have a point, we would then want the newest 10.5 digit multimeters so we could compulsively start going forward in time until we became completely lost, then there is the problem of only organic matter being transferable through wormholes so the future would probably be off limits unless you were to hide it and wait. Same goes for the past only in the past you can hide it and then when you come back it is instantly available.
Of course there is also causality to contend with, if you were to start buying nixies back in 2000 then you may well spark the nixie fashion trend many years too soon and render them extinct.
Also as a side note, causality still comes into play with the future because how could one go forward to
THE future when there isn't just one future? Every choice made now has a butterfly effect so the future you went to and hid test equipment in would have no guarantee of being the future you would get. Therefore any test equipment you hid probably wouldn't be there when you came back for it all those many years down the line.
I have put alot of thought into time travel does it show?