I found a guy selling a Stone Tortoise Shield for 12k. I already had one so I didn't go for it, but wait what isn't the recipe for that 15k? Isn't that a major loss for buddy?
I've been trying to pawn off this Avenger recipe I bought for like 2 weeks now. I bought it for 15k, it's a popular sword, I should be able to get 17k for it? 16.5k? Well, then I hear of people in my guild buying premade Avengers for 19k. Are you cereal? So for an extra 4k above the recipe cost, you avoid having to buy the Sealed Sword, leveling it up, plus acquiring all the necessary materials.
The question is, why is this happening? Are the sellers in the above two cases completely underselling themselves? Or should I just not bother crafting ever again, and just play a pile of T2 runs and buy all the 5-star gear I need? No need to spend energy or waste time on mats, yes?
What's probably happening is that enough people are trying to profit by selling recipes at a little above vendor price (I'm one of them) or by selling ports to Basil that they've made it so that the price of a recipe on the open market isn't a lot higher than the price it costs to get it from the vendor. Look at trade for two seconds, and see how many more people are trying to unload long lists of recipes compared to the number trying to buy recipes. The supply/potential supply of recipes is a lot higher than the demand, because recipes aren't too terribly hard to get. I see - and thus have the potential to sell - a whole bunch of recipes each day. I buy recipes only very rarely. If there were a more efficient system than trade chat, like an auction house, the price of recipes would be driven down to just a hair over vendor price, plus maybe a bit for any house cut.
As for Avengers, they're probably shockingly cheap on the open market for a premade precisely because of what they are - a sword on the path of what is considered one of the best weapons available. What that means is that an Avenger with a nice UV is insanely valuable. In the process of attempting to generate Avengers with UVs, people generate far more Avengers that are just vanilla. Even though the demand for the weapon is probably very high, people still end up with Avengers they don't want because they have no UV, which means that they end up being sold on the open market.