First - 150g for each ingredient? A blue food would cost 112g per food unless you specifically raid bandit dungeons or risk being killed by guards? That's bonkers!!!!
Second - Do you have any idea how esoteric the location of most grocers are? Hell, Bangkorai doesn't even have a grocer after you complete the Kerbol's Hollow quest. The guy marked grocer in Evermore in Patch 1.6 was totally bugged. Its my job for my guild to memorize the location of grocers and let me tell you - this is a very hard task. Is the grocer for Reaper's March in Rawl'kha - nope. He is in Dune, which a normal adventurer doesnt get to until the very end of the Reaper's March quest line. Don't even get me started on the grocer in Sentinel who is no where near anyplace that makes sense.
Third - will "Old Saaz Hops" be vendorable for 150g or 10g? In other words, are you going to turn our long fought for stores of ingredients into mere compost or at least throw us a bone?
apud me omnia fiunt Mathematicè in Natura - Rene Descartes