All of the five recognized species of Nimbochromis (fuscotaeniatus, linni, livingstonii, polystigma, and venustus) were formerly within the genus Haplochromis. That's why they're still referred to as "Malawi haps" even though they're now in the genus Nimbochromis.
Just really depends on area and how much the store wants to charge really. For example there is a store close to me that charges 19.99 for juvi demasoni's lol.