Verified answer

Russian traveler must submit electronic application on US embassy site. After that he/she is invited for visa interview to the embassy directly. He/she brings documents confirming that he/she has sufficient income and strong bonds with Russia. Person must have job with good salary, own property (apartment, cars etc...), have strong ties with family etc... All this must be documented (letters from work, documents from bank, documents about property etc...)

Nobody can help a person to get visa except himself.

You are being scammed.

it's a scam and that is not a friend. Read the US Embassy's warning about this exact scam

http://moscow.usembassy.gov/dating-scams.html

"6. My foreign friend wants to come visit me but says that s/he must purchase insurance and have $300.00 in cash to show s/he can afford to travel. How much money are visitors required to show?

To receive a U.S. non-immigrant visa, applicants are not required to show cash or proof of insurance for travel

"7. The individual I’m writing to says that s/he needs $1,000.00 to show for "pocket" money" or the airline won’t let him/her board the plane. Is this true?

There are no Russian or American customs or airline regulations requiring travelers show proof of income or "pocket money" to travel to the United States.....

"9. My foreign friend says that s/he must go to a tour agency and pay $500 for a visa application and visa, and that it will take 2 months. Is this right? What is the procedure for Russians to get a tourist visa?

All visa applications are submitted to a Russian courier service — Pony Express — for delivery to the Embassy. The U.S. government charges a processing fee for each application. The courier service charges a delivery/handling fee. However, there are no additional fees, nor any requirements to show traveling money. "

Russian tourists do not go through a travel agent to get a visa - they apply through the US Embassy directly.