It is worhth more than its cost (or price).
It is worth more than $50.
It is worth more than the price you pay.
It is worth more than what you pay.
The cost (or price) is much less than its worth.
誇張少少但接近中文意思
It is almost a giveaway. 幾乎免費 (giveaway 免費品)
It is an ultra-value deal. 執倒平貨