Also calculate the cost of qualifying for a professional offer. If paid association membership is required solely to obtain the discount, include that fee and check whether a Polish applicant or business is actually eligible. A headline percentage alone can mislead.
For buyer qualification, ask for the actual criteria. Are they confirming identity and contact details, intended use, decision-makers, funding position and target timetable, or simply asking whether the person is interested? You also need to know what information will be recorded and reported to...