I sold a fair bit of hifi kit via eBay earlier in the year and did surprisingly well out of it.
If you’ve got the boxes and can post I’d say list them individually.
Expect the usual eBay faff of non payers and idiots though. I had a guy bid for and win some floor standing Dynaudio speakers only to advise on the day he was supposed to be picking them up that his wife had said he couldn’t buy them because they had a child with a medical condition which meant they had to avoid loud noises. Obviously slipped his mind when bidding….
If you’ve any decent cables stick them on too, they can go for decent money too.