ZionCheck - A Family Card Game!

Zioncheck is a great card game, and it's really fun! But a problem has been found and we need your say on what to do! There are four options, maybe more, if someone is caught overbuying.  As of now there is no official punishment for overbuying.  For those of you who aren't familiar with this game, it is similar to Phase 10 or Shanghai Rummy.  You are only supposed to buy/purchase cards 3 times per round, and if more than one person wants the card it goes to the next closest person clockwise.  The problem that arises is what if someone over buys?  It doesn't happen all that much, but when it does the punishment is unclear, and it causes a big disruption to the game.   So there are four options that hopefully could work and be fair.  Please leave a comment on which one you think is fair and would work the best!  If you have a suggestion, or if I forgot something please say it too.  Thanks so much.
Possible Overbuying Punishment Options

#1 The over buyer receives 100pts and their number of buys becomes limited to 2 per round

#2 The over buyer receives 75pts and their number of buys becomes limited to 1 per round

#3 The over buyer is punished with 150pts, can't lay cards down and CAN buy the rest of the game
#4 The over buyer is disqualified
#5 (Zsa Zsa Rule): Overbuyer should get 150 points, CAN lay cards down and CAN continue to buy three times during remainder of game. Z
#6 (Papa's): At the beginning of each hand, each player takes three poker chips or pennies. With every purchase, the player must place one chip in center of table BEFORE placing purchased card in his hand. P