They are a fine old aircraft that will preform midway between a 172 and a 180/2, there are 3 versions of them. all will give book figures when operated IAW the POH.
All parts for the GO-300 are available now, except the oil sumps, it takes all the same accessories as the 0-300.
Things to look for:
corrosion in the spar carry thru, excessive back lash in the G- Box, and all the typical things of the 100 series cessnas.
They have 40 degree manual flaps, old style gyros, seat ADs,
the 175s are vary upgradable the engine can be up graded to the 0-360/180 and 200, plus the Cont. 0-360/220 and the Franklin 220. and some with constant speed props, all on STCs
the 210 heavy nose strut fork, and larger wheels, plus a double puck cleveland brake assemblies. 1 piece wind screens, 180 gear legs, are nice off field stuff.
The one shown below has proven it can carry more, and land and take off shorter than a M7 250 Maule. it has the 0-360/180, 210 gear, 850X6:00 wheels, stall cuff, and extended baggage, and long range tanks.