Continued...
Over the course of 2 weeks to 1 month prices will become stable.
Bam. Done.
RMT will still be there but now gil will have no real meaning except for the lazy; Example: you don't want to spend 60k to buy a stack of hq food... you can just level your Cul in 2 days doing Leves and make it yourself.
I am on a server where almost everyone is 100% max level all or close to it so everything is cheap anyway. Hell I'll craft my own stuff from scratch. However when you grind something for a day's worth of work and only make 60k because RMT flooded the market with hundreds of stuff where the prices go from 200k to 40k in 6 hours there are problems.
The only major gil sinks in this game is housing and relic. Relic being bad as your most likely paying an RMT 600k for a grade 4 det off the market board; those other grade 4's ya got? Useless trash now. Your better off grinding dungeons.