Why is it I bought so many copies of TDTWWA and only one BluRay of the TSN score?

(Answer: TDTWWA was on sale for $0.25 a pop one weekend, so I gave the store a $20 bill.)

The temptation's there to buy a pile of Gone Girl records off Amazon while they're $20 shipped, but I'm so against the kind of inflation you see on things like the BluRay and the vinyl that I couldn't bring myself to sell them for more than what I paid for them. Plus shipping.