225's had an exhaust issue around 2002-2004 would be my only concern. If the seller can give you detailed maintenance records and a mechanic says oil reservoir and exhaust ports are fine, among the other critical items, you'd be fine.
I have the 250's and they are very economical as in the "sweet spot" they aren't working very hard so mileage is reasonable, about 1.4gpmi... plus there's always about 800rpm of extra "ooompf" if needed.