Choose the platform for the workload
For virtualization, start with VM count, RAM, growth and storage needs. Databases and business software also depend on disk latency, application behavior and licensing. The same platform with different CPUs and drives can have very different performance and cost.
Chassis, expansion and installation
Choose SFF/LFF bays and backplane before ordering. Rack, tower and blade platforms have different installation needs. Check rack depth, rails, power, airflow and noise at the installation site. Blade servers also need a compatible enclosure and shared infrastructure.
What an exact quotation should contain
List the exact model, CPUs, RAM type/capacity, drives/carriers, RAID, NICs, PSUs and management licences. Specify condition, health testing, included accessories, warranty terms and delivery time for that exact configuration.