I like buying coins off eBay, there are good deals to be had but always keep your head on a swivel. I noticed a new seller that had familiar washed out garbage photography and had a suspicion it was the same photography as Auction Kings. The only coin I've ever purchased from Auction Kings was a NGC graded slab. Not much room for buyer error there. Tonight I saw some similar photography, and sure enough, I searched my purchase history and Auction Kings is now CoinShopArizona. Just a heads up, I'm always amazed the amount of volume they do with their absolutely deceptive photographs.
But eBay's been requiring sellers to post actual photos of the actual coin* for YEARS, and now they're even requiring sellers to pick a grade for raw coins! Surely that's more than enough protection for buyers. * except in cases where, well, I don't know exactly what the exceptions are, but there are apparently lots and lots and lots of them.
I think MORE information is always good. As for sellers having to grade....give me high-quality HD or 4K pics and I can guestimate the range most likely. If it's a raw coin, you know there's going to be a range from any non-professional "grader." A 48-hour notice that one is returning the coin upon receipt would also equalize things.