I haven't really paid attention to the prices of hard drives in that size range, but I suspect it's not old enough or have any rare characteristic that would make many people think of it as valuable. Being sealed makes it more interesting and means people will feel more assured that it's in good working condition, so that adds a premium to the value over a typical used drive, but the availability of so many other similar drives (and not being that hard to find working) would keep it's value down to unexciting levels IMO.
I guess your market would include:
- People generally nostalgic about that time period, maybe they don't intend to use it.
- People facing an 8.4GB EIDE limitation who don't know how to resize larger drives to make them compatible.
- People who want the sound of old drives from that time, or just the general authenticity of being period correct for their system.
- People searching for a particular part number to be an exact replacement of the OEM drive in some PC that came with it from the factory. That's presuming WD's packaging shows the part number of the drive itself. I don't think we've reached the point of many people doing such detailed restorations on PCs, but people get very detailed with old cars so maybe the PC world will get to that point eventually. If somebody was doing a premium restore on a Pentium desktop and wanted that exact part number then they'd be very excited to find one sealed, but that's an unlikely scenario.