Canon ZR800, ZR900, ZR930. They have audio-in, but no manual audio control.
If you are really doing eBay, the Panasonic PV-GS500 or PV-GS400 are really good and I *think* meet all your requirements.
I use a MacBook Pro and pretty much everything I record will be edited in iMovie. My understanding is that a miniDV camcorder is best compatible with macs, so I have been looking for miniDV camcorder. My budget is less than $500, but I will most likely be buying from eBay, so if it goes over that price a little bit, it should be okay.
I do not want a touchscreen, so I haven't been looking at Sony. I want to be able to take stills and I'd like to have a mic input as well as a headphone output or built in speaker. I'd like to have good video quality with O.I.S. and decent night shooting. I'd also like at least 18x optical zoom.