Goingat20 - here is the pertinent section of an earlier post of mine, hope it helps:
For genuine Glaxo dutasteride the Swiss based Merlonipharma -
http://www.merlonipharma.ch - are the cheapest I've found, with 90 capsules delivered to the UK for a mere 140 Euros.
But as I've said elsewhere on the site, they don't have an all-in-one ordering process. What you have to do is complete this form:
http://www.merlonipharma.ch/sme_form_eng.php and they'll e-mail you a price. Unfortunately there's no secure section of their site to pay by credit card, just another form to fill in:
http://www.merlonipharma.ch/cred%20card.pdf which can be e-mailed (safety?) or faxed back to them. I don't know if this is still an option, but in the past I have paid via a bank transfer - which is quite straightforward if you've got an online account that handles international transfers.
Slarti