Intel Easy PC Camera (Web Cam) Model IPCC4E For Sale, new in box, original store seal still on box. Camera records video at 320x240 and snapshots at 640x480, 24 bits (16.8 million colors). Uses USB connection.
I'm not sure how this will work as an astrocamera, but I know articles have been written about results using webcams. This cost at least $50 new, will sell for $35 including shipping.