Hi guys I am looking at a 1999 Argo Response with 245 hrs in good condition the owner says it need seals before hitting the water. It has a 18 hp vanguard engine $4100 is this reasonable what are the pros and conns of this unit ? My brother has a 2014 Argo 6x6 with a 23 hp engine seems like the 8x8 may be under powered.