It may be worth checking the FNAC, Brownie. A couple of years ago I managed to buy the Farlow and the Basie for 33 euros each. It may have been a one-off but I did see the Farlow at that price both in the FNAC in Nancy and Metz.
FNAC.com sells the box for @137,36
Moreover I have never seen Mosaic boxes at those prices at the FNAC Paris stores!
I have never seen them at that price either since that time. It was a bit of a shock when I found those sets for 33 euros. The FNAC is usually very expensive when it comes to jazz and the prices on their website are extortionate. I must confess I hardly buy any jazz in France as we have (or used to have with Fopp) cheaper sellers in the UK. Even Amazon UK seems to be cheaper than Amazon France.