I have a Powerbook 170 in mint condition, with original power supply and some cables. It is lacking a battery, however. If I were to sell it, how much should I expect to get? If I were to sell, I'd like to get as much as possible, to further upgrade some other Macs I have. Also, How much can I expect to get from an iMac G3? Specs: G3 500MHz 256mb RAM 20 gb HD, cd burner.