It depends a lot on the area of the country. In the upper Midwest where I live, each machine would be worth about $300. Being in such good cosmetic condition and working condition makes up for not having a case.
Be careful if you package a machine for shipping, though. Many machines are damaged in shipping. Double-boxing is a good idea. There are vintage machine websites that provide detailled instructions about how to package a machine for shipping. Do *not* trust somebody else's packaging for this, and always ensure against damage. (Insurance should really be paid for by the buyer, because the buyer would need to make the claim. As a seller, I would insist on insurance against shipping damage.)
I should add that I stopped collecting vintage machines quite a few years ago, and prices may have dropped since then because of the economy. It's a good idea to look at "completed listings" on eBay to get a handle on current prices. Where I live, though, vintage machines used to sell for more than they sold for on eBay.