Yes. eSIMAdvice currently lists 5 Nomado eSIM Mauritania plans.
The cheapest Nomado eSIM Mauritania plan is Mauritania · 1 GB · 7 days · 3G, at $24.29.
Mauritania · 10 GB · 30 days · 3G has the lowest price per GB right now: $20.07/GB ($200.69 in total).
Yes. The prices shown already include the ESIMADVICE coupon where it applies.