OBK,
I know it may be tempting to purchase old sectionals from someone but DON'T, there have been many changes since 9/11 to airspace around major cities, powerplants, military areas, etc.
I would strongly suggest reviewing all current NOTAMS prior to starting your flying vacation so that you are somewhat familiar with them, then when you go through them again prior to flying the minor changes will be easier to digest.
Enjoy your vacation,
Mike
NATCA FWA