You only need impressions to price it anyways, this things are typically priced on impressions not clicks.

First off, there is no standardization for this kind of stuff. For normal influencer campaigns. I’ve seen influencers with 20k followers charge anywhere from $600 to $2000 for a single post. Since your audience is B2B focused, I’d say you can charge the higher end.

Just put something to together and see what they say. These things are always negotiable