Please recommend a hair essence that improves hair quality!

I received Moroccan Oil as a gift and used it, and it was really good.

I've heard a lot of people say that my hair becomes silky and feels good when I apply it.

So I went to buy it, but the price wasn't exactly cheap.

37,000 won for 50ml was a bit of a shock!

I want to save up money to buy this later, and for now, I want to buy a product with a reasonable price!

Please recommend some hair essences or serums that are effective for improving hair quality!!!!