writes "I was idly daydreaming about how I could build a small lapping/polishing machine when I thought of using an old hard drive as the platform. The mechanics and finish are perfect, just put a lapping film on the platter and power the thing. So I started looking for old hard drives on eBay, figuring the size and heft would be best for tinkering. I was amazed to find that the prices on 20 year old hard drives is staggeringly high. With that kind of markup, there has to be a reason. It's not just one model that could conceivably be of use in old but very expensive medical equipment for example. It's all of them. ST-506, MFM, ESDI, you name it, the prices are insane.
So there's either a market for a universal Flash->ancient HD bus interface (go for it!), or some people know something I don't!
What gives?"Link to Original Source