I don't believe either of those rules are in contention for the top spot of "old rules that would still be be sweet to use in oldschoolmtg", but that is a fully different post
Find groups that have lots of followers, strict rules and that are private (my preference.) A good example of a really good Facebook group that I think is one of the more popular places to sell Magic cards is MTG Savage Sales (Magic: The Gathering.) They have over 12K members and the admins do a great job making sure the rules are being followed
I would rule out the third option as that would make the Gold Stars significantly more common than in other sets, and I think the second one is unlikely at it would make them too rare
Create a 1/1 colorless Eldrazi Scion creature token with "Sacrifice this token: Add ." Instant Ugin's Binding Devoid (This card has no color.) Return target nonland permanent you don't control to its owner's hand
At the same time, PSA approved an authentic copy of this card with a grade 10 that was later sold for 60000 dollars on eBay back in 2019
In Modern, it is combined with my number 7 pick of Underworld Breach to win games in Modern
