Another issue is that computer prices are really hard to compare across time, especially for systems targeted at businesses. Do you just use the CPI? Why is that meaningful? Do you use the one for IT? (Then it would be like, "$250,000 in 1989 ($1,400 today)") Something in-between? How do you capture the notion that workstations of this era were basically the first generation that allowed businesses to computer-aid stuff they used to do on paper, bringing a massive productivity boost?