Because it is an alternative version to one of the sets most important cards, along with the fact that it features a very popular Pokmon makes it valuable
I was not expecting to get something better in Ikoria when we met Obosh, the Preypiercer
SV has been compared to Swsh, but I think SV has far much more consistent, quality art and promo releases
Urza, Lord Protector On its own Urza, Lord Protector is a very strong card discounting all your spells and artifacts by one mana, which is always a welcome ability in all white-blue decks
So if you have more intention to collect and aim for rare cards than you do drafting the set, this is the place to be
This card features a healthy range from $30 to about $100, as cards in lightly played (LP) can typically sink to the $70 range while anything worse than that usually will stay around $50 or lower