I planted them, 10-12 per clay pot, in 9 pots [one of them took all of the more disformed and young].
I tried to let the soil-sand-perlite mix dry a bit. Let's hope this is the begining of a nice lithops experience over the following years!!!
Total cost in euros:
clay pots x10 = 8 euros
lithops potsx3 = 15 euros
soil mix = minimal cost