If your goal is to minimize negative interactions, swapping them is the right call
Put another way, for every two copies of Teferi, Who Slows the Sunset, theres three copies of Arlinn, the Packs Hope
Ashiok offers us a whopping 20 cards of self-mill for just three mana, AND simultaneously applies two brutal limitations to opposing decks
This years printing of Aminatou, the Fateshifter took the core cards cards like Future Sight and Oracles Vault and added white and black, so I can do fun things like survive Duskmantle Seer longer than everybody else, get whatever I want out of Druidic Satchel, and break the symmetry of Zurs Weirding (since I dont need to draw cards)
one is jumbo-index cards featuring extra-large numbers or suits for better readability
People are paying roughly $4.000 for the 30th Anniversary Black Lotus on eBay, so 8.500 Euros might be wishful thinking or maybe someone is trying to get their money back from cracking those booster boxes