Honor your instinct. Don't rush into the purchase if you're feeling conflicted. You're feeling it for a reason.
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I'd insist on an exchange if the machine had issues that were ongoing/unresolved. Your hard-earned $ should be valued by companies.
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Consider looking on cl, forums, etc. for used machines. That's how I found my gently used HQ Sweet Sixteen. It was within my price range (significantly less than if new) and the warranty was transferable.
Good luck ~