why don't you create one yourself? do you need an Old account or problem is something else? I don't have old accounts but if you can adjust with a new one I can create one for you. let me know if you want one.
You need to post 69 posts to access the marketplace section, thus, this is the main purpose why op want to buy the old account
I have 1 account more than 69 post unfortunatelly it's my main acc,