Real estate agents across Sydney's eastern beaches are calling it the most extraordinary 72 hours of the year. A string of unreserved auctions in a single suburb pushed median sale prices well above analyst predictions, leaving even seasoned brokers visibly stunned on camera.

Buyers from Melbourne, Singapore and London descended on the area with cash offers, sparking bidding wars that spilled into the streets and forced police to manage parking outside two of the larger listings.

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Local cafe owners say the foot traffic has transformed their weekends. One barista described serving "more flat whites in one Saturday than the entire month of February combined," as inspections drew crowds normally reserved for sporting finals.

Economists are now warning that the wave could push first-home buyers further out of the metropolitan market, and the state government is reportedly reviewing stamp duty thresholds in response to mounting public pressure.

Whether this is a short-lived bubble or the beginning of a long-term shift, one thing is certain: the suburb that no one outside Sydney could pronounce last week is now the headline of every property newsletter in the country.