I just returned from a month in Dakar. I had some clothes made and was generally pleased with the results. Not sure if Dakar is unique among African cities in this respect , but there is a huge market for imported material. You can find some pretty decent stuff, but I doubt you're getting a deal on the material (I wouldn't really know as I've never bought material anywhere else). You do get a great deal, however, on the tailoring. For example, I paid (probably overpaid as I didn't bargain as hard as I could have) approx. US$30 for 1.5 meters of 120s wool and then about US$10 to have a pair of trousers made. I gave the tailor a pair of trousers to copy, and the results were very satisfactory. The turn around time was a couple of days. I have had a tough time finding a pair of summer weight, flat-front trousers that I like for under $100, so I was pretty pleased. Obviously, the quality from tailor to tailor can vary dramatically, but you can get a recommendation from the person you buy the material from and ask the tailer to see an example of their work. I wouldn't have a suit or anything complicated made, but for a simple pair of trousers, I would recommend this route.