Am I missing anything?

Well, they'll stone you when you're tryin to be good, they'll stone you just like they said they would, they'll stone ya when you're tryin' to go home............

Everybody must get stoned ... 😎

Looks like it's my turn to get stoned!  🤣🤣

You got all the speakers for a 5.1 A/V system.

Might want to add the amp/procrssor that feeds the speakers.

"Avid Audiophile"  If the cables to the speakers are easily removed, them too. I would think they would be of better quality than Walmart zipcord.

I've never sold here but do occasionally read the "I got scammed selling" posts.  You might take a few minutes to find & read some of those.  They often seem to have good advice about how to protect yourself as a seller.