Yeh legit in the PRC.
To be frank, I don't recommend this course of action at all. For a start GTT is full of sorry tales of disappointment, about buying cheapo tablets from China on Ebay. Especially that Walmart is apparently selling them for the same price.
1) Buy from Walmart. If it goes wrong(as these things frequently do), you just take it back for an exchange or refund.
2) Buy from whatever Shenzhen or Hong Kong vendor on Ebay. If it goes wrong, well you have to ship it all the way back to China at your expense. There quite a high chance of DOA as well, due to the apparent lack of testing and QC in the factories. Good luck raising an Ebay dispute, you'll be waiting weeks.
Thing is, there's some very good reasons why a tablet like this is only $99 and an equivalent Samsung, Motorola or Asus, might be $300.