Michael White over at E4Strategies has a great deal on Clear One Chat 50 USB speakerphone devices. When used with a suitable soft phone these little gadgets turn any PC into a decent speakerphone. They’re even wideband capable.
I’ve been working up an overview of the various USB speakerphones that I’ve used. The Chat 50 is one of the better ones in the group for desktop use. Definitely recommended!
I have no connection to E4 or Clear One, beyond being a happy customer.