Not sure why you're calling me "sour grapes"? I only lamented the fact that I could not afford the thing

"Commodity products for premium price" definitely sounds like sour grapes.

If the products are actually commodity, just buy something else.

I was curious what was meant by that too too, turns out it's a legitimate phrase in the dictionary:

sour grapes, plural noun, disparagement of something that has proven unattainable

> his criticisms are just sour grapes

https://www.merriam-webster.com/dictionary/sour%20grapes