Powered garden tools. Aside from a push mower I have regretted every purchase, the hand tools being faster and requiring less set up/tear down time. The push mower only wins because the mulching ability keeps me from having to rake.
Higher speed internet. They are going to throttle your speed no matter what during peak times, and open it wide open when they don't need to throttle, just pay for the cheapest service where you actually get a signal.
Expensive alcohol. If you can really tell the difference go for it, but pour me another round of the cheap stuff.
Bottled water. Don't be an asshole, unless there's a known issue with the tap water in your area, bottled water is an emergency ration. It also tastes worse? How have you not noticed this? Stagnant water is not delicious.
Personal lubricant. The cheapest stuff you can find that doesn't burn you or your partner chemically (in a way that displeases you) is the way to go.
Bedding, the second best set of sheets made by man is sold at target, they last forever, i forget the exact details but they are awesome, and cost like 1/100th of what the best set of sheets made by man cost.
Computers. I have bought top of the line machines, built top of the line machines, and built second to top of the line, and by far the right way to go is to find the highest quality parts, and then buy the ones priced half as much. You get 95% of the performance, which, lets be honest, is more than enough to read MMM.
:)