Spite. Bardock's PL was sad to be nearing 10.000 when he first was introduced. In his special he recovers from Planet Vegeta's destruction so he should be above 10.000. The SSJ multiplier is x50 so if Bardock's PL is 10.000 then his PL in his SSJ form is around 500.000. Cooler in his base form was strong enough to fight Goku in his base form witch should be in the millions as Goku's PL when fighting Frieza was around 3 million.