You send an RFQ for a list of items. The replies come back over the following days: one supplier sends a branded PDF, another an Excel sheet with their own item codes, a third pastes prices into the email, a fourth attaches a scan of a signed quotation on letterhead. Before anyone can compare, someone has to retype all of it into one spreadsheet.
The retyping is slow, but the real risk is in the details. One supplier quotes per carton, another per piece. One price includes VAT and another doesn't. One supplier quietly substituted a different brand, another left two items off entirely, and a third has a validity of only a few days buried in the footer. These are exactly the things that get missed when a person is copying numbers late in the day.
Then the comparison changes. A supplier sends a revised quote, a new one replies late, or the requester changes a quantity. The spreadsheet is rebuilt, or patched, and nobody is quite sure which version the decision was made on.
So the problem isn't finding suppliers or getting quotes. It's that turning a stack of differently formatted quotes into a fair, like-for-like comparison is manual work, and the mistakes it produces cost far more than the time it takes.