If its put into its owners library, that player doesnt reveal the order
You could use the Buy It Now option if the seller allows it so you can skip the auction, but itll probably be for a higher price than you could have paid if you entered the bidding fray
Vendors typically restock early in the morning, so arriving right when the store opens (or shortly before) gives you the best chance of finding freshly stocked inventory
If they are going to put in the work to turn it into profit, you are not going to get 100% of the value, they need to make it worth their time too
The animation would play when trading in wildcards, but the new card wouldnt be added to their library
Additionally, there are some of the best artwork comes from the special 70-card subset, the Galarian Gallery, that feature reprints of popular cards throughout the Sword and Shield era, like Leafeon VSTAR, Deoxys VMAX, and Origin Forme Palkia VSTAR