You can purchase An optical dvd player from sites like Ebay, Amazon and many other sites. To find the sites, open your web browser, go to Google and search for optical dvd players for sale, you can find litteraly thousands of sites that sell them
The difference between optical and non optical is the way the drive in the DVD reads the disk. Optical is a better and more higher quality reader. So the picture is much better.
There are many places one can purchase a "Coby portable DVD player". It is recommended to purchase one at a legitimate online or brick and mortar store.
You can purchase a backup DVD player at your local Walmart, Target, or Sears. You can also purchase one online from websites such as Amazon and have it shipped directly to your house.
One can purchase a Toshiba portable DVD player from a chain store like Walmart. Alternatively, online websites like Amazon and eBay also sell this DVD player.
You can purchase a Sony DVD player at your local Walmart, Kmart, Target, or Radioshack. You can also purchase a Sony DVD player online at Amazon, Best Buy, Ebay, or directly from Sony's website.
One may purchase a pink portable DVD player in store at ToysRUs or Argos. Also one may purchase a pink portable DVD player online via Amazon, ToysRUs, Argos or eBay.
You can purchase the Thomas the Tank Engine DVD online from auction websites such as eBay. Alternatively, you can purchase this DVD online from retailers such as Amazon.
A car DVD player is a great way to keep passengers entertained while traveling. Car DVD players are available for purchase online at Amazon, eBay and Light in the Box.
A DVD is relatively portable but I suspect you mean a DVD player? In which case it's only portable if it's a portable DVD player.
A CD, DVD or Blueray disk recorder player.
DVD players for cars are available to purchase from most stores such as Best Buy, Target, K - Mart, Wal - Mart, and also online from eBay and from Amazon.
Mini DVD player are made by many different manufacturers; therefore, one would have to decided which mini DVD player to purchase and then find a supplier. One could purchase a mini DVD player at any local retailer that sells electronics.