you pay your money, and you take your choice

You are the one paying, so the decision about something is yours. (Often used to indicate that there is not a clear advantage to one choice over another.) A: "Do you think I should do the guided tour or rent a bicycle and explore the city myself?" B: "You pay your money, and you take your choice. Both are good options, so it's up to you." You could opt for the model with the stronger CPU, or you could put that cost toward a bigger hard drive. You pay your money, and you take your choice.