I used the Aliexpress link Dax provided to get some extra blades. I went ahead and used my credit card. I have a designated credit card for sites I think might be a higher security risk. About once every year or two, I have to get a new card because someone is trying to make fraudulent purchases with the card.
Since I have no scheduled reoccurring payments on that card, it’s no big deal if I have to get a new card. I’ve never had to pay for any fraudulent charges (yet) but I monitor the charges on that card pretty closely.