I think the comment was comparing good post-doc researchers to Lamborghinis. Makes sense as the academic are not offering enough ($4000) for it to make sense.

In this metaphor, the postdoc is the Lamborghini, the speaker is the employer bemoaning the difficulty of acquiring a postdoc/Lamborghini for an unreasonable price point, and the $4000 is the unreasonable price point.

Good CS researches are in some sense the Lamborghinis of developers.