I found a new mail in rebate offer for Free Finish products (up to $8.00 in value). This is what I use in my dishwasher.
Purchase any Finish Quantum Max, Quantum Max Power&Free, Max in 1, Max in 1 Power&Free (18 count or larger), Finish Jet-Dry, Quantum Jet-Dry, Finish Dishwasher Cleaner or Dishwasher Freshener (200ml or larger) and get up to $8 back.
That will cover the cost of the product plus taxes and postage.
Purchases must be made between April 11 – May 18, 2015.