All that everyone has said is true. However, be careful. There are some Viking machines that are now obsolete. HV is no longer making the D1 and there are many machines that they no longer make that you can no longer get parts for repair. This includes the main pc board. Rumor has it that the D1 parts will very soon be no longer available. I have heard this many times recently. You might be better off purchasing a Topaz 20 or 30, they are wonderful machines, but are not has pricey has the Ruby & Diamond.
Good Luck and Be Blessed