This is coming from someone who did spend some money on the game and has two outfit sets. From the purchase experience I had (I purchased during Alpha)
BUT. It's tumultuous and the prices are scooting around still. They seem to be second guessing and adjusting. IF they adjust it lower, you get those coins returned (can confirm from my experience) I doubt they would INCREASE a price? But again
2. They adjusted the price DOWN for an outfit I purchased so I got some coins returned in the latest patch