As was mentioned in the comment below, if the model is not offered on
the website, you cannot purchase a new Dimension 4550 from Dell.
However, it is still possible to purchase an almost-as-good-as-new
refurbished Dimension 4550 from Dell Outlet. According to this search
on the Dell site:
As of this writing, there are 40 refurbished Dimension 4550 computers
The definition of a "refurbished" computer is supplied from their
"All of Dell's new computers come with a 30-day total satisfaction
policy. As a result of this policy, some computers are returned. While
only a small fraction of this equipment is returned because of
technical issues all systems are put through the production process
again. They are taken apart and rebuilt to original factory
specifications, then retested to ensure the same quality and award
winning workmanship standards as new. We even use brand new boxes for
Because our systems are refurbished and then retested to meet Dell's
high quality standards, we offer the same limited warranties1 as the
Dell has achieved the industries highest awards for customer service
and customer support, and we include the very same service and support
levels with each Dell Outlet system we sell. Additionally, if you are
an existing customer for any new Dell system purchase, your customer
service and technical support remains the same.
With every Dell Outlet computer you purchase, you receive the same
award-winning technical support that comes with each new Dell system -
24 hours a day, 7 days a week."
With this information, you should be able to get two quality Dimension
4550's that will meet your needs!