It would be nice if some of the low marker 50% continental L21s could be persuaded to upgrade themselves. The main selling point I suppose is that L21 still covers a large area and that finding clusters from 67 markers is perhaps the only way we could break this down further at present. How much do FTDNA charge to upgrade nos of markers to 67 from 37 or lower?
Here's the STR upgrade price list:
12 to 25 $ 49
12 to 37 $ 99
12 to 67 $189
25 to 37 $ 49
25 to 67 $148
37 to 67 $ 99