http://img28.imageshack.us/i/flasks.jpg/
above is a spreadsheet i made with excel that uses current prices(i didnt include vials cuz they are cheap) vs what an item sells for.
when i input prices are put in prices for an average to buy the cheapest 200 herbs and to sell the flask i put the lowest price up there.
i would lose even more gold after the ah gets its cut.
pre patch i could make like 50g per flask but now its just dumb