ASIC Miners for Ethereum

Hi friends!

I just joined this excellent forum to learn a lot from all of you, and then share my experiences.
I am about to start mining Ethereum, and on Alibaba I have seen some Lhinzi Phoenix at a very good price between 500 and 600 dollars. There are also some Innosilicon A11s at a good price.
The problem is Ethereum 2.0, since EIP 1559 is implemented in July, which will reduce the profits of miners.
I would like you to answer the following questions:
Until when do you estimate that there is a track to mine Ethereum? on many pages they estimate 2 or 3 more years.
Has anyone bought from Alibaba, and what result did they get?

Thank you in advance for your attention.