Not "American trained" in business or a "native" English speaker; here are a few of the many things that would keep me from applying:
Dear, D.C." We don't put the comma after "Dear" and, in business, we don't address someone by their initials unless we have an established relationship;
"The task of the Internet Seller to sell item on auction ebay", should be:
The task of the Internet Seller
is to sell item
s on “auction ebay” ("auction ebay" is missing the capitol letters and is grammatically unsound);
"…commission starts from 650$-900$"
Dollar Signs on the wrong side of the amounts; "Before receiving of item"
another grammatical error...
I'd have serious doubts about receiving any paycheck from someone who is this ignorant of standard business practices.