I've got the above mentioned head unit, which is a lesser known, great option for an affordable period correct unit with all the modern features we'd like to have in our 911's. The more well-known version comes in at around $500. I bought one for my 88, not realizing I needed more pre-amp inputs than this unit has for my specific configuration. New in box and I'm including the harness. $150 shipped to the lower 48. Some features and details below.
Main features
RDS tuner
FM (RDS), AM
Convenient choice of files
Playback formats: MP3, WMA
Fast reading from USB
Selectable display modes (file, folder, title, artist, album & time
Data carriers: USB
9-digit display
Integrated Bluetooth (HFP, A2DP)
Integrated microphone
Front USB
Front aux-in
4 x 40 watts max.
2-channel preamplifier
Sound presets (flat, rock, pop, classical)
X-bass
Red key illumination
