NX/Meso Worth

You can get mesos for a lot cheaper; the hackers' meso sites offer mesos for about $1 -> 4m, so that's where the exchange rate hovers at. Meso bags are just overpriced, and you can't sell mesos for money, so the exchange rate floats based on the meso sites' rates.

And yes, Basil prices are always under what the scrolls are worth, because people pay for convenience. That's why shop price (instant buy) > free market price (find someone there and then) > Basil price (find someone and arrange a time to meet)