Booking shinkansen Sendai to Tokyo

Hi! Planning to buy non reserved car tickets from sendai to tokyo in december. I read a few posts that buying tickets at the station is more worth it but is it really so?

One way price on klook is around 10560 yen (base + limited express) at the moment do you think I should just book on klook?

Ps. First time taking shinkansen here 🙂 Would appreciate any advice given hehe

by ir1thel