Recently, I powerleveled inscription on an alt to try my hand in the glyph market. For those who are unaccustomed to glyphs and the AH, it's typically a very automated and cutthroat market with a ton of gray area in terms of profitability; depending on raw material supplies and server economy. Some servers economies are so dominated by glyph barons, that finding well-priced glyphs for the average buyer could take weeks of scouring the AH. However, on other servers glyphers are so competitive that many are willing to sell at cost to push their product regularly. In any event, auction-house tact and strategy is no more prevalent anywhere than in the glyph market. Given my penchant for micro-strategies in the gem and enchanting scroll markets, I didn't have time to "play ball" with the glyph kings of my server. However, I did develop a simple posting and layering strategy that not only covered my ENTIRE costs of leveling and mat costs in 4 days, but also helped provide a steady secondary gold income to augment my haul in other markets.
To begin with, you will need a scribe leveled to at least 475. As you learn more glyphs through Northrend Research, etc. etc., you will invariably make more gold by having a greater selection. But in the beginning, you will have to make due with what you have already. In leveling my alt to ~490 in Inscription, I spent roughly 3000 gold and roughly 1000 more gold on my first stacks of cinderbloom to mill. On my server, stacks range anywhere from 20g to 35g depending on the day of the week. Knowing I wanted to do this ahead of time, I of course was able to snag some well-priced stacks beforehand.
Before I go through my process, I need to mention one tool that was invaluable in my quest. I honestly could not have succeeded (at least so far) without using the add-on "TradeSkillMaster" with its herbing and auctioning bundles. Essentially what this add-on allows you to do for inscription, is easily queue glyphs for crafting while also providing a simple list of mats required to complete the glyphs. It also shows your current quantity in bags, in your bank, on alts, and even on the AH so that you can see where exactly your supply is at. Below are some screenshots with the interface:
TradeSkillMaster also has an auction-house component that allows you to quickly post glyphs or any other items with any set of customizable parameters. You can control your undercut, your breakpoint below which you won't post a particular item and the maximum/minimum amount of one particular item you want to post. You can also configure items into groups (e.g. glyphs) for even easier posting. Altogether this took about 15 minutes to configure and has saved an untold amount of time for me even after just a few weeks.
Back to my plan and execution. Basically, my goal with glyphs was to spend as little time and to make as much money as I could playing the glyph market casually. I decided to completely avoid trying to reset particular glyphs for one. Instead I decided to just sit on glyphs that were not profitable. From my experience on my own server in the past few weeks and from knowing the basics of just about each spec and class in the game, I can say that the majority of glyphs that were not selling well, were glyphs that should not be used under any given circumstance by a class. For example: Glyph of Starfire. Some people might see it as a potentially decent prime glyph for boomkins; however, it's terrible and the market price for it is indicative of that. It never once sold above 1g in the three weeks I scanned glyphs. On the contrary, many minor glyphs actually sold quite well because of the general lack of minor glyph utility for each class.
Nevertheless, the most consistent performers were the prime glyphs. More important to note, the prime glyphs of feral druids and affliction warlocks, two of the most FotM PvP arena classes at the time. In that vein it would be important to note that if you play on a serious PvP server such as Illidan, Tichondrius, Sargeras, Blackrock, etc., it would be wise to understand the "state of the PvP union" to put it briefly. PvPers are constantly rerolling or rolling alts to take advantage of strong compositions or other class imbalances; more so than PvEers. By understanding the PvP community, you can make a strong profit in the glyph market. My two top sellers over the course of three weeks: Glyph of Rip and Glyph of Corruption, by a landslide.
However, I played the market with the vast majority of my glyphs and used my material supply efficiently, crafting glyphs that had been selling well the previous week and crafting popular glyphs that were fetching top dollar in my scans. Twice a day (once in the morning and once before raid time), I spent 5 minutes reposting my undercut glyphs in batches of 5 for 12 hour intervals. Making sure to keep a supply of popular glyphs in my bags whenever I logged on, I was easily able to repost glyphs that had sold the night before or during the day. The only time I would ever mill was on the weekends when I had time to spare and had snatched up a solid supply of cheap herbs over the week. In total, I made roughly 4000 gold in the first 4 days, and have continued at a pace of ~1000g per day selling glyphs in a marginal amount of time. Especially considering the rather cheap prices of glyphs on my server and the multitude of AH-botters and glyphers, I would say there is definite potential for this to succeed on any server under any conditions. All you need is the basic knowledge of supply/demand, a strong add-on like TradeSkillMaster that can automate the process, and 10 minutes a day and you should be raking in easy gold steadily, and more important, casually.