Magazines ain't what they used to be....one of the reasons is PPRuNe! we get our fix and then some on flying gossip and advice without having to shell out, and we get to answer back (mods permitting)....
As for selling your airplane, I tried various listing services, couldn't bring myself to shell out the money for a reasonable ad when everybody else's ads looked so juicy.....so I sent a poster by snail to all likely flying clubs, and lo, it worked!
The only other excuse for reading the flying mags used to be to read about the accidents, and thereby learn from other people's mistakes... well, that's on the net as well. Newspapers are feeling the pinch badly. Nobody reads the Oxford Mail any more....