Post-purchase trauma
Its a term coined by Evan Geezo describes medical condition where the patient suffers emotional trauma after a purchase.
diagnosis:
a patient with Post-purchase trauma will have the following symptoms:
1-feeling of regret after a purchase
2-remembering consistently about when and how much they spent in the past
3-brag about their purchases in front of others and taking pride while in reality it a way to hide their regret
Different cultures can have different level of regret after a purchase, over haggling can be indicative sign of Post-purchase trauma