We'd like to have a Dropbox Business plan with less than 5 licenses.

I agree. It's too expensive and the five user minimum is unreasonable. We are a three-person IT support team. We'd like to have a Dropbox for Business account so that we can remain intimately familiar with the features and speak intelligently when recommending services to our customers, but we don't want to pay for five users when we only have 3 (or possibly even two now).