I owe this tip to Debbie Garrett author of The Definitive Guide to Collecting Black Dolls and BLACK DOLLS: A Comprehensive Guide to Celebrating, Collecting, and Experiencing the Passion:
The Mixis dolls - LE Opal, SE Houda, and SE Rosa - are on sale for $39.00 EACH at
AuntJeansToys
I've read good reviews about "Aunt" Jean's customer service from the We Love Black Dolls Yahoo Group. Also, Aunt Jean operates from New Jersey so the postage within the U.S. should be manageable to U.S. collectors. (Aside: no disrespect to overseas or outside U.S. collectors or dealers.)
Happy buying!