Ebay is a meat market, FB also is useful for those who want to hide or play on those who feel intimidated at auctions or are perhaps a bit shy.
No problem with that, we're all different.
Auctions allow items to find their own price, often an education in itself! The other thing I like about auctions is everything you see could actually end up being yours, all you have to do is be the last man standing. Sadly the auctioneers can be a tad naughty and lacking in scruples or conscience in the way they operate their business, (happily we are not all like that
) nuff said!
An open sale allows the same examination of the goods, no commission to the buyer, and the chance to negotiate. If the offer is refused it's not personal, merely a business decision. At a sale there is the time to ask questions and be advised, sharing of knowledge etc.
They're too dissimilar to compare really, I see merits and issues with them all.
I've bought off eBay, only to travel miles and find it's not as described or judicious camera angles have been employed.
And as someone who has been organising Auctions and Collectors' Days for 20 years (who remembers The Fox Inn?) I have endlessly experienced the frustration of promised entries that don't materialise on the day.
Hence my grateful thanks to those enthusiastic stalwarts whom have always done their utmost to support or just be there.