The most you'd spend on a scope

[Press]

If she doesn't have a key to the safe, it could be a goodly long while before she notices if you are sneaky enough about it.

Just brace yourself for the inevitable fallout when she eventually finds out you bought two new guns.

Sneak in some enjoyment in the mean time

[Skadoo]

On topic ; I would spend as much as I could afford whilst taking into account things like warranty etc.

Sound advice.

A good scope lasts you forever so a few extra $$$ if possible is a good investment.