Thread
Price check on a PowerBook 100?
A working PB 100 without adapter sold for $65 on eBay recently. And one with what appears to be a faulty hard drive sold for $50. So you're looking at that sort of price range. If its got accessories, spare batteries, manual, etc, then you should be looking more towards the $100+ mark. Hard to say without seeing more completed eBay listings, but those are the ones I found. Hope that helps.
It depends on how much you want the machine and what you can afford. Think about the poor screen, even compared to early TFT screens, the tiny trackball and the HD that might reach EOL any next day. Keep in mind to pay USD 100+ for any reliable HD replacement, or the hassle to hunt down another computer for parts. Ask for a reasonable, low price to liberate the PB.