I'd have thought a 'Magic Detector' gadget, that just gave a Yes/No, and if you are lucky a (rough) power level and direction would be a very popular thing people would want.
Followed by some sort of "Magic Analyser", that gave some details you could use to attempt to figure-out anything magical, the 'dimensionality' of the magic, some sort of useful parameters.
I'm pretty sure people would at least try and use handwavium to build this sort of kit, even if they were very skakey on the theory.
Finding materials that interacted with magic, insulated from it, conducted it, would also be pretty high up there on the list. Building a ritual area that smoothed out the wobble in local magic, so you get a consistent level to work with, at least inside that volume, might also be remarkably popular.
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"It is the business of the future to be dangerous" - Hawkwind
Followed by some sort of "Magic Analyser", that gave some details you could use to attempt to figure-out anything magical, the 'dimensionality' of the magic, some sort of useful parameters.
I'm pretty sure people would at least try and use handwavium to build this sort of kit, even if they were very skakey on the theory.
Finding materials that interacted with magic, insulated from it, conducted it, would also be pretty high up there on the list. Building a ritual area that smoothed out the wobble in local magic, so you get a consistent level to work with, at least inside that volume, might also be remarkably popular.
--
"It is the business of the future to be dangerous" - Hawkwind