This card's inherited effect is a [Your Turn] effect, so your black Digimon will lose as soon as it drops below 13000 DP
As far as value goes, there doesnt appear to be much of a different between the two printings
Look around on marketplaces to see what is selling, check sites like Magic Madhouse to see which cards are selling for the most at the moment, and even comb through the PSA grading directory to see how many of a card have been verified as genuine
He can simply negate one attack of one of the opponents Monsters and as a quick effect resummon himself from the GY by tributing two Synchro Monsters you control as a cost whenever you like during the opponents turn
It should identify the correct printing, show where its prices come from, separate raw and graded value signals, and flag uncertainty when the scan may be wrong
Three years after release, OP-03 has become one of the most sought-after sets in the One Piece Card Game