B2B sales person on commission?

I need some people to get new clients for my advertising /marketing agency. I haven't been able to find anyone or any company who works on commission only. I only want to pay for performance, and I would give them a very fair commission, but only after the business deal is closed; I don't want to pay them by hour just for trying to sell something.
It's also a relatively easy sale, because or prices are really low (that's kind of our thing; we're a "budget agency"). We just don't have the time to go after new clients anymore. We have a great website and professional sales presentations, etc.
Does anyone know people (or companies) who sell B2B services based on the terms above?

I would like to add that I don't need the person or company to be sitting in my office from 8 to 5, the work can be done from anywhere, from home, as an extra job, on the phone and internet. This is why I think I should only pay for performance and results, not per hour. The idea is kind of like outsourcing sales.

You are going to run into a problem because most people do not have the financial ability to go 3 months without a paycheck. Plus, you have to remember that someone just getting your name out there has value.

My industry is basically set up the same way - I am an insurance broker. I was offered a lot of offers I could not take.

However, I finally found my current boss, who set up a 5 year plan. I had a bad first year, but since then I have been doubling goals.

So I think what might work for you is to find some people you trust, and try to work something out...

I'd be interested in something like that. Maybe a few hours a day over the phone after I get out of work.
I'm a commercial broker so I work the phones every day of the week.
I'm always looking for more opportunities, and like you said if you only pay me by performance than you can't lose anything.
Email me with a few details and your # if you'd like to talk.