for BSC and POLYGON, the fees incurred to send them to any exchange, or to other wallets are not that big, even the fees can be quite cheap. however, for ethereum, it depends on how much gas there is at the time, so you'll need to check frequently on gasnow.org or https://etherscan.io/gastracker. Well, for transactions from wallet to wallet, it depends on the gas price at that time, but from exchange to exchange, it is quite expensive, and almost every exchange has different fees. I personally use FTX for ethereum transactions because I feel that the fees given are cheaper than others, but currently, FTX is required to verify KYC. maybe everyone has a different place than me. collect references and check one by one.