70 440 HP worth $450 ????

Buddy of mine is broke and needs some cash. He offered me his 70 440 HP out of a 70 roadrunner. Complete low mileage engine. steel crank, 906 heads, 70 4bbl intake and carb w what I think is aftermarket chrome valve covers. Block is dated 9/?/69. If it were a 340 id be all over it. Not up on big blocks. Is it worth the $450. Was a strong running engine until he wrecked the roadrunner 20 yrs ago. been sitting on a stand in a heated garage ever since (as a conversation piece). Should be taken apart and cleaned up I imagine. He did take the rocker arm assemblys off, oils the cylinders and turns it over every so often. need to let him know by tomorrow, if I dont buy it another buddy wants it.