If you can get the retailer to state to you the serial number on the unit...it will give you the date of manufacture...

The first 2 digits are year...10,11,12...etc
The next 2 digits are month... 01,02,08,12...etc
The next 2 digits are day... 01,02,08,30 etc
The next 2 digits are production line in the plant..
The next digits are sequential units built on that line - that day...

Rickie