Oh dear what have you done now!
Logic and common sense, it just won't do.

Everyone knows that if it says 'marine' or 'aircraft' one has to pay at
least 4X the real cost.

Admittedly some items are made expressly for marine use, alternaters and
starters in gas powered boats and should be used BUT as you say $359 for a
$70 battery is extortion and needless.

I am looking for a dock supply water filter. Marine catalog $130 Sears
$44. Both made of plastic. Both will take all 10" filters.

Thanks for some refreshing light on 'marine' equipment.

David Morton