The 1400 is a relatively nice machine. It's not exactly a speed demon, even with G3 upgrades realistically, but it's Good Enough and you can put it in a bag and take it with you, which you can't exactly do with, say, a Quadra or a PowerMac. If it includes a working floppy diskette drive, you can get access to CD via SCSI or you can put in an Ethernet or WiFi card, or you can use LocalTalk networking to transfer files. (Mine has a 30gb disk and I use it to host software files for older machines without ethernet or tcp/ip).
$85 is kind of a lot, but if you want one, don't have a machine like this, and have the money for it, it might be worth seeing if you can negotiate with the seller in the $50-65 range. That's still palateable for the best possible version of this machine, which includes capacity to run 64MB of RAM, reasonably sized and easy to find IDE hard disks, system 7.6.1 through 9.1 (I have the 7.6.1 EN-US restore CD imaged if you'd like), wifi ethernet and CF card adapters via its PCMCIA slots, an 800x600 screen, and there are a couple different options for the expansion bay.
If you really want the machine, but you don't want it more than $20 worth: you already have your answer. If you want it more than that, I would say it's reasonable to offer in the $50-65 range, at least for my budget and my area. The value of any given thing will realistically be different in a large tech metro area than it will elsewhere, for example.
