I'm going to care either way, because I would fight with their phone support and go through the credit card dispute process regardless of the amount, for the principle of the matter. I probably wouldn't take the $20 to small claims court though, unless I had lots of free time. Though ultimately I can understand that your getting defrauded out of $700 stings a lot more than if you were defrauded out of $20.
> because they're not marketplaces
Most online retailers are turning into marketplaces. That's the doubly unfortunate thing about Amazon's shitty business practices - everyone else sees them and feels compelled to adopt them.
Trying to name retailers that sell electronics that aren't marketplaces - B&H, Adorama, Bestbuy. Maybe Monoprice? Although they've expanded their selection so much, it feels like something dodgy is going on.
I'm actually a big fan of eBay because despite being a marketplace, they don't handle inventory themselves so the incentives line up better - they understand sellers will sometimes ship broken items, try to stonewall returns, etc. I understand the fees are a bit high for sellers. But as a buyer, being buyer-friendly is my #1 concern, and eBay understands buyers are the ones with the money.
Then again I could be one ML classification or policy change away from eBay's dispute process not being so favorable to me, too. Although I haven't had to do one in a while - most sellers have made peace with buyers' power and just offer free shipping for returns.