I can't afford it, it's too expensive.

我买不起，太贵了。

《牛津词典》

It's too expensive and anyway the colour doesn't suit you.

这个太贵，而且颜色也不适合你。

《牛津词典》

It's too expensive, I don't have enough money to buy it.

太贵了，我的钱不够买它。

youdao

but sometimes, if it's too expensive, I don't think it's justified to buy organic.

不过有时候，如果太贵了，买有机食品就不划算了。

在绿色市场 - SpeakingMax英语口语达人

I think so. But video phone has been very hard to achieve. It's either been to be expensive, or too crowded, or can we use the internet to finally introduce video phone and this is different from video on-demand.

我也这么认为，但视频电话要成功很困难,它要么很贵，要么很拥堵，或者我们是否可以使用互联网引入视频电话,这与随需视频是不同的。

麻省理工公开课 - 媒体、教育、市场课程节选

Oftentimes, inventions that seem, in the abstract, to be good ideas may be impossible because something that you have to do to make it actually come into practice is too expensive and so it's not economic to produce the invention.

通常在理论上,创新固然不错,但却很难实现,因为把创意变成现实,花费会相当的昂贵,实现这样的创意非常不合算

耶鲁公开课 - 金融市场课程节选

"It's too expensive for us to do it for everybody right now, " Mr. Michelson says.

WSJ: The Weekend Interview with Leslie Michelson: Doctor to the 1% (and Maybe Someday to You)

People aren't using taxis anymore because it's too expensive, so we aren't getting any work.

NPR: Oil Rich Iraq Suffers Through Gasoline Shortage

It's too expensive and haughty to be all that casual, and the "sophisticated takes" often detract from classic American food.

FORBES: Fact and Comment