This is a "must" for all -- do not leave Ghana without going to this place.
It is chaos -- how no one gets run over or falls down, I do not know.
If you can get a Ghanaian to take you, do -- I know several that can. Otherwise, you will wander around and either miss things or just get lost.
Here you'll find thousands of street stalls with vendors selling everything and anything. One thing I would recommend is the fireworks -- they are cheap and great. I cannot get fireworks like that in the UK.
You need to be careful here -- there are deep drains at the side of the roads.
Never pay asking prices -- another reason for either learning the language or taking a local. The minute they see Obroni ("white man"), the price will triple at least. Show interest, ask the price, then appear disinterested and go to walk away. There is the same thing around the corner and that stallholder will not want to lose a sale, so you will see the price come down.
This is the place to buy your African gifts. DO NOT BUY AT THE AFRICAN CULTURE CENTRE -- they will be 10 times the price there.
You can also get your African cloth here at a better value -- 12 yards for a man, 6 yards for women. You'll have to take it to a seamstress, but, again, I know someone that can help you.