Replacement part manufacturers

I recently bought a refurbished M6700 that has only the HD+ (1600x900) screen. I realized that with the 17" screen, that resolution is not enough. I went online and found very cheap (100 USD) Full HD displays here : https://www.screencountry.com/index.php?section=products&model=PRECISION%20M6700&brand=Dell&series=PRECISION . Are they the real deal? What can I expect at this price? If these are just imitations, where can I buy the original display?