V at n
II.7 The 'balk' and 'jump' group
These verbs are concerned with being willing or unwilling to do something.
To our surprise were told that as they were about to change the display we could buy it for £500. Naturally, we jumped at the chance.
In the case of balk and jib, the preposition at is sometimes followed by an '-ing' clause.
balk jib jump leap
The prospect of higher taxes will make employers balk at hiring workers and consumers will be reluctant to spend.