Swiftness Potion is a great moneymaker, even on non-pvp servers like mine. And from what I know, it seems to be one of the few Potions that remain a steady seller regardless of your server. Play around with the price abit, if your server allows you to do so. Willing to bet you can get more than 50s each. ;)
As to the other recipes you ask about, alot depends on which server you're on, I would think.
Any sort of Water Breathing pot is of dubious saleability (is that even a word?). There are very few quests requiring underwater travel, and parties in those instances with water tend to try to bring a Lock. These pots might be something you want to advertise being able to craft, and see if you get bites, rather than waste coin listing it and hoping someone needs to do a water quest soon
Arcanes: Better seller than the water breathers, but probably sells more easily(as with any sort of heavy buff potion)on weekends, due to guild raids, pvp parties.
Rage Potions of any sort: Don't sell on my server. You end up eating them and hoping you got a skill up out of it. Again, maybe try to sell them on Weekends. Your server *is* different. :)
Swim Speed Potion: No sale. These are the sort of potions you almost never see listed, because, frankly, who needs them? How many quests involve swimming, really? And, lets face it, with only one kind of aquatic herb and vast expanses of nothing but aggroing mobs and the ocassional clam, who bothers swimming around anyway?
Shadow Protection(s). I know the standard potion to be used in a tailoring recipe (Hands of Darkness). As well, Shadow Protection items are heavily sought for PVP. IMO, second only to Frost Protection items. These sell semi-steadily.
Stoneshield Potion: I actually did the quest to earn this recipe with a retired alchy toon. I never sold one. I certainly tried. I ended up using them in a guild raid of ZG.
Demonslaying: I would think - and here I'm speculating ~completely~ - that there's a market for these now. Thanks to BC and the Demon-heavy HP.
Rocket Fuel: a non-seller. This is another one with limited use. Rather than make them, advertise that you are able to do so and see what happens.
Ghost Dye: I've heard of it. even seen the recipe once. Never met anyone who was looking for it. Advertise it and see what happens.
I apologize that I can't give you more solid information. Too many variables, not the least of which is server differences.
If you aren't sure about a recipe, and if you can't find the product on the AH to compare to, I'd suggest the Trade Channel route. It can't hurt, and you never know what that one individual may be looking for.
Edit:
Stacking Elixirs and Potions
I think this is a bit tricky. Alot of things to consider.
Mana/Health Potions sell by the stack, for the most part. Protection Potions *can* be sold by the stack, but if I only need 2 for Recipe A, or 3 for my next BG run, I may not be looking for a whole stack.
Every potion is different, depending on what the consumer intends to use it for. And you just can't know. Hedge your bets. Make as many as you intend to and
play with them a bit. List a complete stack, a half stack, a single, a pair. See which sells faster and which provides the best profit. Oftentimes, 1-2 potions will sell faster than a stack, and for more coin individually.
Two potions I can speak on directly.
Swiftness: IMO, stacks of these will always sell steadily.
Frost Oil: ALWAYS sell singly. You won't be disappointed.
Herbs (for when you start offloading your excess)
Swiftthistle sells, for me, in any size stack I list. (My current main is not an Alchemist, but he is a weedpicker. :) )
Earthroot: As I mentioned before, try to sell at least half of what you pick in stacks of 5. The druids will love you, and maybe stop spamming your Auberdine.
Wintersbite: Sell in stacks of 2. Unless someone specifically requests more.
Good luck. Hope this longish rant both makes sense, and helps a little
Edited, May 24th 2007 2:27pm by pipedream