Totally agree about FB though; seems to dredge up the dregs of potential buyers... although I think to an extent it depends on what you're sellng. While probably in the minority I've dealt with some sound people on there too and all things considered prefer it to giving ebay my money.
I agree, about 1 in 10 on FB are genuine, the endless messages “is this still available” drive me absolute insane, but in the end a normal person ends up buying your item.
I‘ve used eBay for years and it is reliable, however the fees have become crippling, they’re far too high, it’s a real shame Gumtree has fallen away, I really used to like it.