Folks who are good at eBay will immediately start fencing these goods and organized crime will move in to keep the law at bay, offer territory protection, and to "organize" the operations to maximum "illegal" efficiency.
Goods that are not eBay worthy (i.e., can command a higher price or sell with lower trade fees or less hassle) will be resold at yard sales and farmers' markets.
While this legal change may seem like chaos waiting to happen, it is actually a law that permits the smooth redistribution of wealth by Obama's sons.
Companies selling in CA will look upon this as a cost of doing business and will price their goods accordingly or stay out of CA.
As an aside, the thieves still have to get past security. That is another pressure point where organized crime will have influence. They will pay security guards to turn a blind eye to their thieves and to focus on freelancers (i.e., non-mafia operators).
As I said above...smooth operation.
This is another example of how the Democrat Party is just an extension of organized crime, from the big drug cartels to the theives who shoplift and sell stolen goods.
Ebay is old school. Everyone is finding their items on the new marketplaces...Facebook marketplace, LetGo. etc.