Here's what you do:
1. Set up some kind of company/website that sells whatever it is you want for free.
2. Write to whoever makes what you want telling them you have just set up your company, and ask to be put on their mailing list.
3. Wait a few weeks.
4. You are now on their database. Write to the same company saying you are looking to purchase 500 - 100,000 units, could they please give you a quote for price and delivery times, and one complimentary model for evaluation/demo purposes.
5. Give me the $25 if that works
