Decent BUIS for less money?

[SPQR 70AD]

One technique I've learned in the Arctic that works temporarily for fogged scopes is to spit water on the ocular lens when it fogs from your breath and face heat.

Another is to wear a face mask and be in shape enough to have a low working heart rate so you don't exhale so many BTUs through your mouth and nostrils, but that would involve taking it easy on the pralined candied yams, fried turkey, homemade stuffing, fresh rolls, gravy, my cranberry sauce recipe with cloves and cinnamon, coconut creme pie, caramelized pecan pie, blueberry pie...what were we talking about again?

Another option besides battery-powered micro RDS is the Trijicon RMR, with multiple dot sizes you can choose from.

Offset or piggyback the RMR for your close range movers and back-up aiming system to a quality variable power scope for hunting.

Not a low price option though.

Examples of Aimpoint vs Trijicon RMR (with fiber-optic illumination)

looking thru those red dots and the way the severely limit the field of view I still say for most work the issue ghost ring irons are the best and with a little practice can be used with both eyes open