so, with prices being sky high, I wonder which would be the best to get
1. Turbo CD
2. US TurboDuo
3.  JP TurboDuo
4.  Duo-R
All are expensive on ebay anyway, even the broken ones.  Any advice greatly appreciated since I'm new to TG16 collecting.  I have a TG16, just no games and no CD.
Oops!  Edited to avoid offense!
Well, I owned a regular Turbografx-16 for like 10 years with one game, Keith Courage.  So, I decided last month to shop for a Turbografx-CD, since I already had a TG-16.  I got it for $200.00 on Ebay, which is not bad considering the CD add-on alone can go for $250 - $300.  I'm about to buy an import converter from DB-Elec (he makes homemade converters) so I can use the Japanese System Card 3.0 to play Super CD games and imported titles.  So in total, I will spend about $310 to have full CD capabilities (minus the Arcade Card, which only had a few titles anyways) on the Turbografx-16.  To me, that's cheaper than spending $400 - $500 on a Turbo Duo, which I heard breaks more often.  Plus, I like to go with the original system rather than the "upgraded" Turbo Duo.   But that's just me.  :-)