This tool is/These tools are a bit expensive. I wonder if it's worth it to buy it/them or not.
I'm wondering if it's worth it to buy this tool/these tools. It's/They're a little expensive.
少し高価 = a bit expensive / a little pricey / a bit on the pricy side
工具 = tool/tools
買うのか = whether to buy (or not) / if I should buy it (or not)
迷っています = I'm wondering / I'm going back and forth (over) / I'm trying to figure out
Is it worth it? はよく使われています。この表現は、私はそのことをしたら、「結局悔いはないかな」のニュアンスがあります。
ノートの説明の言い方法も教えたいです。
If I would always use the thing that I bought then I wouldn't think twice about buying it, but for something I would rarely use, I'm wondering if it would be worth it to buy it.
Not think twice about は、「決まりは決まり」または「よく考えずに何かをする」といういみがあります。
アメリカ合衆国 
