inflated in‧flat‧ed [ɪnˈfleɪtd] adjective [only before a noun]
inflated prices, sums etc are unreasonably high:

• These company directors are paid grossly inflated salaries.

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inflated UK US /ɪnˈfleɪtɪd/ adjective
an inflated price or value is higher than it should be or than is reasonable: »

Evidence suggests that travellers have been put off by the inflated prices.

grossly/highly/vastly inflated »

Faced with vastly inflated prices in the south, property investors have been looking for bargains in the north.

Financial and business terms. 2012.