A client paid me in ETH, but the only network they could use on their side was Polygon, so the funds are sitting there now. I normally keep everything in my main wallet on Ethereum Mainnet, and I’d rather not leave part of the payment on another network. I’ve been looking at ways to move it over, but I don’t want fees eating a big chunk of the transfer. What are the practical options for getting ETH from Polygon back to Ethereum Mainnet at a reasonable cost?