There are several great pairs of Repetto flats on sale at Forward by Elyse Walker right now, my favorite pair, the Distressed in Silver still has lots of sizes available! For reference, I usually wear a size 8 but in Repetto flats I take a 39, sometimes 38.5.
Repetto suede flat in navy | $168 (size 36 left)
Repetto distressed lambskin flat in silver | $171 (lots of sizes still available!)
Repetto glazed flat in floyd | $176 (sizes 36.5, 38, 38.5 and 40 available)
Repetto flat in rosegold | $186 (36.5, 38.6, 40, 40.5 and 41 available)
Repetto flat in cuba | $203 (37 and 40.5 available)