I usually look at price history on anything I buy and see where the one I’m interested in place among those. What’s the lowest ever price, etc. You can research this a lot. Eventually you will get a feeling what’s good and what’s not. Black Friday coming up as well. Never a bad idea to see what happens. Only rarely do prices raise after compared to before.
Rule number one when buying tech is your always get ripped off. There is always a better deal two weeks from now. You just have to get a feeling when timing is good enough for what you want.