Wabash Valley – Wabash Valley drivers happy to see falling gas prices.. According to the online site GasBuddy the average price has dropped 2 cents per gallon in the last week make it about 10 cents a gallon cheaper then this time last month. As of Monday the highest price in the state was $3:13 and the lowest was $2.65 per gallon. A survey of 3,271 gas stations in Indiana found that the average price of gas in Indiana is sitting at about $3.13 per gallon