$459.... and you can use the charger on other things.....

$459 - 70$ for the engine part = $389 = @ 22 gallons of glow fuel...

which you no longer have to buy.....

I can burn 20 gallons EASILY in one summer.......... and you still have many cycles left on the battery.... and you can use it in other things....

do another conversion and you can move the batter(ies) back and forth.......
cost just "went down" some more....

So you just need to remember that whether it is glow or electric....you still pay...just it is either up front...or over the next year....