Where can I get a 250ah battery for $5? I see prices in the hundreds, and weights over 150 lbs. Edit: Though we only need 5 of them, not 9. The whole point of

Where can I get a 250ah battery for $5? I see prices in the hundreds, and weights over 150 lbs. Edit: Though we only need 5 of them, not 9. The whole point of deep cycle batteries is that it's OK to discharge the quoted capacity every cycle.