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Ebay seller that i bought my second (new in box) R2020 from contacted me asking if i wanted another. I don't need a third but he is interested in unloading the 3 he has remaining and probably cheap from the sound of it.
So if anyone has been looking for one of these to connect your DC (with a phone line simulator as well) to the internet let me know and i will get you his contact info.
In case you have no idea what i'm talking about see below thread.
New method for connecting Dreamcast! - Dreamcast-Talk.com