Advice please 1/12th pan car , newbie

[Jonathon555]

I am looking to getting into racing 1/12th pancar but not sure how to tell the good from the bad. I already race gt12

I already have some electronics spare , hobbywing 1s , 10.5 motor , 6400 1s lipos, servo

But that's where I get stuck .

I don,t know 1 chassis from another .

Am I best buying new or used ? What is a good reliable chassis

Advice welcome and appreciated