I used to own a mid 1960's C-172, and was very happy with it, although it was no speedster (Continental 6 cylinder engine, 145hp.)
A few lessons learned as a former owner:
Join the Cessna owner's club - great resource
The Aviation Consumer's Guide is worth subscribing to.
Get a recommendation for a good mechanic and make friends.
When you are ready to make an offer, your pre-buy inspection should be a FULL ANNUAL.
Do a title search.
Whatever you think your costs will be, add 30%.
Be cautious of planes that spent lots of time in high humidity (corrosive) environments. This can cause major problems with both airframe and electronics.
Be aware of insurance issues - higher premiums, limits on liability, etc.
Do not skimp on Maintenance. If you are not willing/able to pay for the (surprise) $5000 annual, don't buy a plane.
Avoid a plane with an engine with less than about 200 hours. Most problems after an overhaul occur within this period.
Good luck and have fun. I had a great experience as a Cessna owner, but it is not for the feint of heart (or wallet)