@rich_one_day I buy weekly with a savings plan at Strike. From the second week of the savings plan, Strike no longer charges any fees. 😋 Take a look at the article and comments from @stefan_21. I've attached the link for you. There are cheaper exchanges for one-off purchases in terms of fees. I think @stefan_21 recommends Binance here.
@rich_one_day Strike, 21Bitcoin and Relai are great for savings plans. The "old" exchanges such as Binance, Kraken and Co. are well suited for larger one-off purchases, as the fees are very low. However, it is important to know that you pay a fixed fee in Bitcoin for withdrawals, which is why these exchanges are only worthwhile for larger amounts :)
