Driver advice

Hello! Today I went and got fitted for my driver in town. They had me hit a bunch of clubs as to which I can't remember all of them. The main take aways from the fitting I got was that I hit the Cobra Dark speed and the Ping g430 10k both very well. Putting my angle at 9° put my angle and spin in the window he wanted, and he was happy with me using a regular shaft 55g.

Pretty much I'm wondering if its worth just outright buying the club I hit well with and spending the $600, Or could I just buy a driver from last year of the same brand with the shaft and angle?

Tldr: hit good with cobra dark speed and ping g430 10k at fitting with 9° lift and 55g regular shaft. Should I buy one of these or can I buy older driver similar model for cheaper? ($600 is a lot 😭)

Thanks