Any issues with Money Back Guarantees offered?

I should have read the details but the main advertisement stated 30-day money back guarantee! The first hidden charge (it was mentioned on the website, but didn't think it would apply to my order) was the excessive duty I paid to receive from overseas ($86). When returned I was hit with a 15% re-stocking fee and the Paypal fee. I didn't mind the shipping cost; that's to be expected. But 15% on each item sure added up; almost $450 for a 30 day listen. Then a $98 Paypal charge back. So much for a demo with a money back guarantee! I am writing this so other audiophiles will be sure to read the fine details of offers such as this and give careful thought if this is actually worth the expense!