The prerequisite for flexible quotation adjustments is to separate "condition setting" from "document generation." If you have to recreate catalogs or PDFs every time you change prices, it's not only time-consuming but also prone to version confusion—buyers' old versions won't match your latest conditions. A more efficient approach is to centrally manage quotation conditions for different customers or different markets, so that when conditions are modified, quotations and product pages automatically reflect the latest version without manual recreation each time. At the same time, each quotation sent should preserve a snapshot version from that moment. This way, if buyers come back for confirmation later, you can still check what conditions they were looking at.