Dividing a price by every delivered row can make an unsuitable file appear inexpensive. A more useful denominator is the number of distinct contacts that meet your campaign rules after the relevant exclusions. Define that denominator before making the comparison.
Usable is a campaign definition, not a promise of delivery, replies or revenue.
For a national starting point, explore our USA real estate email list and choose the audience and market for your brief.
Define a qualifying contact
State the country, professional role, location basis, required fields and acceptable verification statuses. Specify whether a shared inbox qualifies and whether you want one person per company. Apply existing exclusions through your organization’s established process.
Keep this definition the same across vendors. Otherwise a lower cost may reflect looser inclusion rules rather than a better offer.
Use a transparent calculation
Cost per usable contact equals total relevant acquisition and preparation cost divided by qualifying unique contacts. Keep the list price and preparation estimate visible as separate components so another reviewer can understand the result.
For a purely fictional example, a $500 file plus $100 of preparation costs $0.30 per qualifying contact if 2,000 distinct records pass your rules. Dividing only $500 by 10,000 raw rows would describe a different metric. These numbers illustrate the method, not this site’s prices or inventory.
Account for uncertainty
If the final usable count is not known before purchase, calculate a conservative and an optimistic scenario based on documented assumptions. A sample can reveal problems but cannot establish every whole-file characteristic.
Do not turn a verification label into a projected reply rate. Keep acquisition efficiency, delivery results and business outcomes as separate measures.
Reconcile after preparation
Compare the purchased count with the prepared and imported counts. Log records excluded for country, role mismatch, missing fields, duplicates or prior suppression. Avoid counting the same rejected row multiple times when reporting the total reduction.
Use the actual results to improve your next brief and ask for a remedy where the file failed agreed requirements. A fair comparison rewards usable fit and explainable terms rather than the largest advertised total.
- Cost: price plus relevant preparation expenses.
- Count: unique records passing all agreed rules.
- Assumptions: visible and consistent.
- Outcome: reconciled after preparation, separate from campaign results.
Make each quote comparable.
Write down the qualified contact unit and exclusions, then compare the total cost for that same population. Keep unsupported values out of the calculation.
Review the quote checklist