Depends. If the order is a few thousand dollars, you should have it setup to let them wire you the money or even checks (if the company is in the US).

Normally, for products up to $2K, companies take care of it with credit card. For higher products, you should encourage them to contact you. If you check a few SaaS companies, they have an enterprise plan with no details, encouraging you to contact them directly to find out more.

We mainly invoice our enterprise customers who pay by check or ACH. However, some do have purchase cards that they use and make payments as high as 100K on a credit card.