I have a modded Dreamcast free to a good home if anyone wants it and lives in Melbourne or Sydney. (I've found emulation easier for me these days, as I try to simplify my physical setup).
Very nice of you to offer, and rather tempting - though I have no time to play.
How is it modded? I recall that certain models, identified by some number on the bottom of the console, allowed burned discs to be played. What extra can you do with a modded system?
Near as I know, all DCs can boot suitably-prepared burned discs without modding. The only hardware mod I’m aware of would be to defeat region lock on original discs.