My wife and I keep falling into the same trap where we'll see a 'limited time offer' or flash sale and one of us will push to buy something we don't really need because it feels like we're saving money, and then we feel stupid about it later but we keep doing it anyway.
More people experience this than they realize.
You're both susceptible to scarcity marketing and loss aversion, creating a feedback loop that overrides your rational financial planning.
“Where Are You with Behavioral economics — biases in financial decisions?”
If this sounds familiar, the Library can help you find the bigger picture.