Time for a new thread!
Once you and another user have agreed on a trade, one user comments below with the details of the Trade (including the DB numbers of each celeb involved, and ideally the full Card ID for each card, too), and the other user replies to that comment to Confirm.
You can find the DB numbers of every celeb here.
A mod or volunteer will process the trade as soon as possible, and reply to one of the comments to inform you that the trade was processed. Please allow up to 48 hours for someone to process your trade before reaching out to a mod or volunteer, although they are usually processed much faster than that.
We have a Trading Channel on Discord that is a great resource for looking for potential trades, as is the Trade Database.