Does anyone know where I can buy an A10 Pro or when the A11 will be released?

Hey Guys! I got scammed bad by and paid around $17K that took me years to save up for! I want to get an A11 or A10pro but from a legit website this time. Any ideas on where to find one or a list of legitimate ASIC Miner vendors?

Will a10 pro and other etherum miners become useless after ETH 2.0 or proof of stake ?