Question: I am a Canadian residing in vienna. I applied for an iranian visa through www.uppersia.com. I found their service to be prompt, friendly, and efficient. I would highly recommend this service to anyone applying for a visa to visit Iran. The cost of the service was not expensive at all.
Answer: Iran visa issuance is easily done by filling in the visa form on http://www.uppersia.com/Iran-travel-services/iran-visa.html, it takes about 10 working days to get your reference number and two working days to collect your visa at the embassy by direct referral or one working week by posting the docs to the embassy. You can pay the visa fee in cash in Iran.
Check the cheapest Iran tours at http://www.uppersia.com/Iran-tours