Lee, the pharmacy of choice here by most of the guys is alldaychemist.com, in India. It is safe, reliable and the drugs are generic formula's of the big 3 in the US. The shipping charge is $24.95, any quantity. There is a slight risk of Customs issues, if so, they will replace the pills for you. There is currently a 2 for 1 offer on the generic Viagra (sildenafil citrate) and Cialis (tadalafil). Levetra is vardenafil.
Note: if ordering tadalafil, they will request you email them and confirm you will not be consuming them inside the US. The guys who use it seem to be frequent world taravelers and always reply they travel and will be using them outside the US. A little shady and a little gray market, but the sildenafil citrate is .57 each, compared to $9.00.
A couple of guys use a Canadian pharmacy, for a higher cost, but they use the same drugs, imported from India, that you will get at alldaychemist. Whether you wish to buy from India is a personal decision.
www.alldaychemist.com/menshealth/