I am looking for a good herbal medication to cure premature
ejaculation and seminal leakage. The internet is filled with hundreds
of sites selling all kinds of herbal medications for above mentioned
dysfunctions. One site I have found is www.herbolove.com where experts
are available to answer questions and suggests products sold by this
site. How can I confirm that this is a legitimate site selling
products that really work? Can you suggest a legitimate site selling
high qulaity herbal medications that actually work or suggest a way to
find a legitimate site? Thanks a lot.

You can't confirm it: there is no proof of any of the myriad herbals'
effecacy, because they don't work. Sad, but true.

Check out Deferol for premature ejaculation. There are clinical trials
showing it works. Here is a URL:

http://www.seekwellness.com/impotence/deferol_about.htm

I agree with surgeon-ga.  If you are interested, the following article
offers some discussion on the role, albeit limited, of herbals in the
treatment of some types of erectile disorders:

Morales A.  Developmental status of topical therapies for erectile and
ejaculatory dysfunction.  Int J Impot Res. 2000 Oct;12 Suppl 4:S80-5.