Is it me or should the price of fewell be sold cheaper then it is atm?
I hope you didn't buy the fewell from the synergy master... those guys should be shot for overpricing the stuff they sell
As already stated, you can try to buy the fewell from AH, but (at least on my server) it is in very low offer and usually overpriced as well.
The best and cheapest way is to level alchemy to 35+ and make it yourself. Buy the oil from Nogga in Bastok, buy the slime oil from AH (or farm it yourself in Korrolloka Tunnel) and buy the colored rocks from the guild vendor in Mhaura (usually has a stock selling at 1-2K a rock). Even at low Alchemy skill, creating only NQ synths, you get 3 fewell orbs for around 2-3K. That's 150 fewell to burn. If you have high Alchemy skill (or now a friend that has, willing to craft you some orbs), you can easily HQ and obtain 12 orbs per synth, which makes the price of fewell really dirt cheap.
The one thing I have noticed about it is that it seems rather expensive when put next to other crafts. The gil I've spent from lvl 1-7 so far has cost me 100k.
Personally, I find Synergy very cheap to level, compared to other crafts, and by the looks of it, it will stay cheap from the very first levels all the way up to the higher levels. The trick is to 'fail craft', i.e. deliberately failing your synergy attempts. In this way, you only lose your fewell, all base ingredients are recovered and can be used over and over again.
You can make it even more interesting by combining the fail crafting with etching. My favorite recipe is the Behemoth knife. Just buy a Behemoth knife from AH (or any other augmentable weapon), buy a Mordant and an Revertant from the Synergy master and start etching. Even if you fail the synth, you can still get skill ups, without losing the base ingredients. If you succeed you will get an etched knife and an amount of cinders (which you will need eventually if you want to use synergy anyway). Just use the etched knife with the Revertant and succeed the synth, and you obtain an original knife and more cinder. Rinse and repeat for skill up and cinders. This way you can cheaply build up a cinder supply (up to 10K I believe) and skill up at the same time, just at the cost of the fewell.