Mary W.
Yelp
I think this is a very worthwhile stop. The site is one where slave auctions took place. But to be sure, in Charleston at some point, such auctions took place on the streets all over the city. It was such a phenomenon that the Charleston municipality, who were concerned even then about traffic, and the poor image that the buying and selling of human beings gave the city (although they didn't descry the practice itself) issued an edict prohibiting slave auctions from taking place on the streets. Then, the buying and selling of human beings were done on the inside. This is one of the original locations for the "inside" sales.
It's a good museum. There are numerous large story boards, if you will, focusing on the domestic slave trade. That is, the sales were done of slaves already in the U.S. (not those just arriving from the Trans-Atlantic journey). These people were already working on plantations or other smaller farms, and were being bought and sold for various reasons. Some time was spent on describing the "slave traders," the middlemen (if you can call them "men"), who did the despicable task of preparing human beings for purchase. They did things like dyed the hair of older women and men so they would seem younger, putting oil on the hair and skin of slaves so they look healthier, covering scars from whippings (since beatings were thought to be a sign of an insubordinate spirit), and even force-feeding them for a while so they looked more robust. Young men in their 20s were the most valued, fetching at the time, around $5,000.00 (equivalent to $100,000 now). There are audio recordings of actual slaves, who lived until their old age (some more than 90 years old), and were interviewed in the late 1930s as part of the WPA (Works Progress Administration) under President Franklin D. Roosevelt.
But upstairs is a bit disjointed from downstairs and you feel a bit lost. There are inexplicably rows of chairs in the middle of the room as if anticipating a lecture, but none is forthcoming, and if there are groups in the room it can be hard to navigate around. The upstairs addresses the slave trade more generally, in other geographical areas, among other things. There are some nice pieces of artifacts, and interesting information, but it just needs something else to bring it together. I think a docent would really help at this museum. I also think some live presentation is called for, especially upstairs. I have lots of other ideas, too! (Give me a call, Museum Board, and I will share!)
Regardless of its shortcomings, (as others have pointed out), it is STILL a worthwhile stop on your trip to Charleston. And you should support this kind of place, as its research is quite good, and it's a modest fee to gain admission. Also, check out the little bookstore at the entrance to the museum. Quite good books that can be tough to find, even with Bezos' site.