i recently purchased a flightdeck for my bike and wasn't too expensive.
i bought the older computer 6501 as opposed to the 6502 because i don't have a 10-speed and it only cost my $15 including shipping for a brand new one.
i opted for the wired harness this time because I wasn't too sure about the wireless because of some unsatisfactory posts about wireless units here and there. the harness was about $35.
i could have opted for the wireless for about $60-70.