Frontier Perks pricing - will it come down?

[arizonacolbys]

We are flying into MCO next Saturday and then flying home out of TPA the following weekend after a couple beach days. I purchased Frontier's Perks bundle this morning for the MCO portion of our trip & it was significantly cheaper than what it's quoting me for the return flight home from TPA. :/ $79/person as opposed to $49/person. Does anyone know what this price is based on? Is it based on the flight price, day of the week, seat availability or how close to your flight you are? Trying to decide if I skip the Perks on the way home and just buy another bag or 2, or if maybe the price will come down when my trip is only a week out? This is my first time purchasing the Perks through Frontier - any advice you can offer would be greatly appreciated!