You can’t buy that kind of thing by just putting it in a shopping cart and checking out on some website. You have to call, work with a salesperson for a company that specializes in the product, and then place an order. They’ll send you the product and an invoice with payment instructions. This will usually be a check or wire transfer. If it’s a big enough order, you also have to work collaboratively on logistics to receive it. How far they will take it and how far you have to go get it will depend on your contract. This can be as little as “you have to pick it up from our warehouse” or as much as “we’ll get it into your warehouse” They might take it as far as the nearest rail yard and you have to organize trucks for the last mile.