Right now there is a premium for 172 and 182. This has had the effect of pushing up values for 177 and, ironically, Dakotas. The "value" play of a 177 are the 68s which are woefully under powered. The premium is commanded by the '79 whose gear retract faster due to the higher voltage of the model (24v vs 12v.) I looked at these and they are a catch, provided yiu get a decent pre-buy.