I have seen too many players buy the for Cr. 12 million, only to realize it drives like a wet sponge in the rain. Yes, you need it for the trophy. No, you should not buy it unless you have Cr. 20 million spare.
Here is a write-up on the top Legendary Cars in Gran Turismo 7 today, categorized by their value, performance, and historical significance. gt7 legendary cars today top