Decided to organize the OP with all the different versions of the Yoobao case available. Hope this clears up the confusion between the cases.
V1 (Original Yoobao Case)
This is the original Yoobao case known as V1. This case has no flap to hold the iPad in place. Many users reported that the iPad would slide out of the case very easily. This case should be avoided and make sure that ebay sellers are not selling you V1.
V2 Type A
This case is very similar to the original case however it has the big added feature of a flap that tucks under the iPad to hold it in place. This is similar to the Apple iPad case. This case is recommended.
V2 Type B (Also known as V3)
This case is also sometimes called a revision 3 case but Yoobao listed it as "type B". It is similar to the original case and V2 type A however according to Yoobao it has two elastic cloth straps holding the iPad in place. Most users seem to prefer the security of the V2 type A case over this one.