I don't think it's reasonable either. The eBay market is strange: 1GB 50 pin scsi drives go for hundreds of dollars, 486 machines can go for $150 and ISA sound cards can be auctioned for hundreds of dollars (http://www.ebay.com/itm/Roland-SCC-1-ISA-Sound-Card-/1623420...).

Don't get me wrong, this is a total waste of time - but the market is probably there for someone who wants it.