*pel- `to sell, to make money'. 1. Alb. <blej> `to buy' probably
from
> prefixed and suffixed metathetic variant *H1en-+ *ple-n-yo
The prefix *H1en- is not 'mandatory' here (even you can add it too):
a form *ple-n-yo regularly give blej in Albanian :
see
1. bletë 'swarm of bees' < *melit-eh2
2. bluaj 'to grind' < *mleh1-n-yo < PIE *melh1-
I think that the rule is :
*ml > *mbl > *bl remain to can establish all the contexts in which
m > mb
Marius