I don't know exactly what kinds of herbs you are referring to, but here are some places I have used:
greenbush.net
~ has non alcohol liquid extracts in single herb forms that are very convenient if you are looking for Saw Palmetto, Fenugreek, Wild Yam, Fennel. They also have bulk hers and capsules if you wish. Great customer service and fast shipping in the U.S don't know about out of the country
iherb.com
~ large selection of herbs, cheap shipping
swansonvitamins.com
~ lots of supplements competitive prices, fast shipping in U.S.
Greenbush has super-fast shipping, and iHerb is good too. I get bulk herbs from Mountain Rose Herbs, along with empty capsules and muslin tea bags (reusable) for herbal teas. Their empty capsules are vegetarian (I don't think they mention this, but the ones I received were.)
Greenbush doesn't have a huge variety of herbs, but they look and smell fresher than those from Mountain Rose. They also send you free gifts, like tea, with every package.