There might be a trend where Exodia is seen as just another solitaire deck, but personally, I prefer the Exodia that you collect without the opponent noticing, rather than a 1-turn kill
However, when grading foil cards, you might want to take into account, that foil cards are not only playing cards, but always collectors items as well
Can you pull anything good
Armored Shark Level 3 WATER Fish Effect Monster ATK/ 500 DEF/ 2000 (This card is always treated as an "Armored Xyz" card.) You can send 1 WATER Xyz Monster from your Extra Deck to the GY, then target 1 Fish monster in your GY with a Level equal to the sent monster's Rank
The fact that some sets dont have individual boosters, with these mini tins providing the cheapest way to get hold of boosters for those sets, makes the non-random versions of the mini tin much more appealing than others