Hi Sally,
Unless you have a friend who's able to give you access to a sandbox, there are no options for non Customers.
However, you can continue to access the Nation and Docs.marketo.com. If you haven't noticed, Nation is fairly open to non users now. You can also visit blogs like mine, Etumos, Knak, RevEngineMarketing, etc. that often post on martech or Marketo issues.
Eloqua is a different interface, however, the concepts are similar...so you wouldn't be that out of the loop.
Of course, you should work with your managers to sell them on keeping Marketo!! Why would they want to switch?? Find out those questions and figure out how Marketo does those things and is helpful. The cost of switching can be high and may not bring the results intended. Most of the time people switch because of poor implementations where they believe the "value" wasn't obtained. It's rarely the "tool" but the process and lack of lead funnel data.
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