>>306555824
buy it from Amazon and return your used one if it doesn't have a serial number, or the serial number can be removed. Don't let them identify it. 

Now take the new one and ebay it or craigslist and use the money to buy an index. If they can't identify the serial they'll still refund, but if they can and it's different they'll throw it away. Apple products are a NO GO for example, way too obvious.