Okay, let me see if I can clear a few things up, though my craft is Leatherworking and not Jewelcrafting.
First off, if you want to make your life easier, when you are looking for an item to craft on public orders look for a small box labelled “track recipe” and tick it in. That will make the recipe show up in the same field as your tracked quests are so you do not have to take photos/screenshots of the mats required.
For tips I recommend tipping between 1k and 2k gold. Crafters can only fulfill 1 crafying order per day if I recall it right. These work on a charge system, so once they are out of these charges they cannot fulfill any more public orders until thry generate a charge. While there are people who readily do crafts below 1k gold they tend to be crafters who are leveling up their profession, so the quality of the craft will be questionable at best.
I think the reason why recrafting is not on public orders is because a recraft can lower the quality of your craft. Having ut on public orders will only end in disaster.
The reason why you cannot set a quality is because of the reason mentioned a few posts above: people would only set max rank quality, which means it does not fulfill part of its intended purpose: to allow crafters to level up their profession.
The reason why you cannot put your crafted piece on the AH, I feel, is because it not only disincentivises you from using the system, but it could lead to people trying to get stuff crafted for cheap and then sell it on the AH for much more.
For a crafter with a lot of knowledge crafting anything at 424 ilvl is a guaranteed rank 5, while others from 437 may require an extra material provided by the crafter to guarantee a max rank craft: an Insight. Usually this is what a crafter asks the 3k for. In case of consumable stuff like armor patches and gems a crafter can only guarantee a rank 3 with insight, so it will always have a higher asking price than 1-2k.
EDIT: Alright, time to finish this.
What issue we currently have with crafting orders is that there is not that much information readily available about it from the buyer’s standpoint. A lot of the customers I have for example do not even know what an Insight is, nor how the knowledge point system works.
I think a good way to solve this would be to make mettle useful for the customer as well. Have a questline that explains on how it works, and make it so that the crafting order poster have the option to add their insight to the order. That would reduce the income of the crafter though, so I am not sure if Blizzard would lean on doing this one.
For now what I can advise is to check your server’s forum section, see if there are crafters advertising their profession there. If you got a crafter to craft a gem for you keep the name of the crafter saved somewhere in case you need a piece crafted in the future. Until Blizzard implements something like a way for crafters to advertise their craft on a board of some sort, and buyers get an option to favoruite crafters for future crafts this is the best method I can think of for having crafters available for your gear crafting needs.