Try this
- Agree on a total for the particular item, including delivery or necessary accessories where known.
- Compare options within that amount. If an option exceeds it, return to the decision rather than treating the original budget as approximate permission.
A worked example
“For this lamp, what total feels comfortable to each of us?”
An invented example to adapt, not a real exchange or a script you have to follow.
Before you leave it here
Do not treat agreement on one purchase as approval for related extras.