Imagine saying you shouldn't have to pay extra for heat/air conditioning because you already paid money for a house.
If you can spend some cash on video games, you should (or at least I think) reasonably be ok with forking over a few extra dollars to make the experience better for yourself. I own the game on PC, but I like playing controller. Ergo, I purchased a real Microsoft controller for its weight and how it feels in my hands versus a cheaper, general controller. You buy salt and sugar for food to give it the flavor you want regardless of what pre-made meal you purchase from the store. You buy in soles to make shoes fit more comfortably despite spending money on the shoe. The list goes on but the point is the same. You are standing in the rain here, letting yourself get wet when buying an umbrella is not the end of the world. And many places offer return services. Did you consider finding a store that allows full refund returns? I know I have ordered packages that come with return stickers.
And if money is that much of a concern, then do you honestly think subscribing to an mmo is the right choice?