Multiple sellers have dropped their listing price by five or six-figure sums as some agents report a âseismic shiftâ in demand in sections of the property market. While Perthâs median property prices increased 1.1 per cent over the month to June 7, according to the Cotality index, demand is tempering in some pockets. Rising interest rates, cost-of-living pressures, Budget changes and global uncertainty have combined to slow market demand.