Not sure if it qualifies as retro, but I just placed my order on a supposedly JTAG-able Xbox 360, the type without HDMI (aka Xenon revision). Low price (250RON, about $54 or so.), comes with 2 wired controllers and no HDD. It's also very clean on the outside, from what I could tell, needing
These "blades dash" units seem to go for insane prices no matter what board revision they are. This one seems to have that one as well, although in a state of "disrepair", as it has a botched update.
Thankfully I have a Raspberry Pi to read the NAND and try to rebuild the dash, before doing JTAG on it (well, technically I still have to half-JTAG it to get the CPU and DVD keys in order to rebuild the NAND.)
"Enter at your own peril, past the bolted door..."
Main PC: i5 3470, GB B75M-D3H, 16GB RAM, 2x1TB
98SE : P3 650, Soyo SY-6BA+IV, 384MB RAM, 80GB