So after looking at both Porygon-Z cards from this set, both are fairly even, they both have the same HP and retreat cost, and very similar moves, I like the first move on this Porygon-Z card better, but I like the main attacking move on yesterday's card better than today's, so you really can't go wrong with trying to incorporate either card into a deck
Once you have your prices locked in and your stack sorted, you can dive deeper into how to sell Pokmon cards and pick the selling strategy that fits you best
Seems a more than reasonable rate
As long as you have at least 7 life more than your starting life total, creatures you control get +2/+2
For example, you can search for a next stage Pokmon card from the deck and evolve 1 of your Pokmon
The rarity symbol is printed in the bottom-left or bottom-right corner of the card, next to the card number