There's an entire industry of "closers" (and the natural companion, people selling courses on how to build an agency of closers). Pitches like "we place closers into your business and guarantee they close business or you pay us nothing" are the standard. The reason this business model is not as good as it seems is that the incentives aren't aligned, these closers don't care about the business, so they'll sell to bad clients to hit their targets. You can definitely be successful doing this (so don't be discouraged, if you do it well you'll stand out) but you're competing with an ocean of trash that so many businesses / startups have been burned by and/or are apprehensive of. "high ticket closer" is the phrase you can google for to find examples.

edit: https://www.reddit.com/r/sales/comments/146gjwu/what_the_hel...