my first hard drive was 500mb and was about $500. also bought an external 2x CD rom drive, which had a caddy and came with Myst, for $700. this was around the early-mid 90's.
The 70mb Unix drives were iirc about $4000 in 80's dollars. Or maybe that was the 4mb of memory. I actually have the sales brochure and have to dig that up.
Edit: Yes I do mean 10MB!
Oh, I believe you. I say that because I was skimming to see if anyone could "beat" me. You tied. :-) And the only reason I was skimming was to comment to parent, who said they thought they'd never fill a 13Gb drive: yeah, that's what I thought when I bought a 10Mb drive 30 years ago.
Now, I don't think you can even buy media that small. Hell, the internet is infested with single web pages that wouldn't fit on that drive.
http://media02.hongkiat.com/vintage-tech-ads/hardisk-waiting...
Contemplate this for a moment. Not exactly plug-and-play!
First moderately modern drive was a Rodime 3.5" 10MB. Smuggled out of the factory somehow (which was just down the road from where I worked). That was the first drive that looked like they still do today.