The cost of the camera that Professor Hardy would like to buy in 1969 was about £258. In 2020 that would be about £3600. In Australian currency that would be around $7045 in 2020 dollars and about $4480 in 2020 US dollars. Quite an expensive camera! No wonder he takes on the case from the missing man's business colleagues. He would probably charge them around £300 to £350. That's around £4500 to £5000 in 2020. More than enough to buy his camera.