The Hawke Endurance ED or Opticron BGA 10x42 monoculars suggested above are as good as you'll get without spending at least double, and what I'd recommend.
Monoculars are somewhat harder to hold steady freehand than binoculars, so it'd likely that you'd end up holding the monocular agaist a convenient tree/wall/fence quite often.
Its rubber armouring weights the choice towards the Hawke (the Opticron is painted metal, and would scuff up), as does the separate focus wheel, which wouldn't be obstructed by whatever the monocular is held against.
One other consideration, that really needs a try out to resolve, is whether you can get infinity focus without your glasses on.
If you can, things like rain on your glasses, or sunglasses in sunny weather, are less of a hindrance, as well as not being another surface to pick up dust and smears.
Unfortunately, dioptres past infinity isn't something that most manufacturers put in their published specs, and hence reviewers don't usually list it either, so you'd have to ask.
My precription is -6, and I've found that Zeiss are OK, Swarovski are right on the focus stop, and I can't not use my (photochromic) glasses with Leica.
If you want a proper telescope for office/tripod use, there's
this Kowa TSN-4, still showing a £130 starting bid. Pretty scruffy externally, but it was a top end scope back in the day, so unless it's been dropped it should be pretty good.