The ZX 16K RAM was launched in 1981 by Sinclair for £49.95 for use with the ZX81.
At £29.95 per 16 KB this equates to £1.87 per KB which equates to £1,871.87 per MB which equates to £1,871,875 per GB.
Now the ZX81 obviously could not support such huge amount of memory but this shows how much technology has changed and how much the price of memory has come down over the last 43 years.
