買い替えた方がお得ですよ。

tbd

You will be better off buying a new one than trying to fix it.

電子レンジの調子がおかしい。修理するより買い換えるほうがいいかな。

tbd

My microwave is acting up. I think I'd rather get a new one than repair this one.

もう電子レンジは買い換えてもいい頃です。

tbd

It is about time we bought a new microwave oven.

It's about time we bought a new microwave oven.