I will repeat my post, without naming. Hi, from Brynhildr.(I am from Ukraine and play on the American server, sorry if i made mistakes ^_^)
Shortly before 5.3 release I was starting make gils for huge house. And from this moment I see many bots like gathering-crafting. Some easy rule you can check this in your worlds for try find bots or cheracter oriented on make gils for RMT. 1) They use Chocobo. 2) They love use Busy status. 3) You can check they jobs, 99% have one battle jobs and full gathering-craft list, some bots oriented only in gathering jobs. 4) You can check their profile on Lodestone and 99% they have only basic minions-mounts. 5) Sometimes it's a FC bots and twink for storage and free new retainers.
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Some bots as mentioned above use own algorithms for items price, in ours server I can highlight two. They drop price in ***. If items cost 200-230k(and people on server buy it) they can easy lower price with step 10-50k gils.
For examples .
They destroy price on items, and sometimes you need wait for prices will stabilize and you will be able to benefit from the sale, rather than sell items at their cost. Now on on different items fight for price and craft only bots, sometimes ordinary players too try sell their item. But you need live near board or hope bots in this moment crafting, gathering recources or a lot of buyers.