u really need a lace front wig to acheive this perfectly and the sheer fact that the ebay wig seller isnt at least at a 99.0 percent positive rating means steer clear of it.
go with arda's lacefront that you listed is really good. granted you do need to cut it but since its all slicked back a few wrong cuts wont be super noticable.
Adelheid (KHR!)- 85% done
Fem!Austrian War Succesion France (Hetalia/Nyotalia)- 10% done
Fem!Izaya (Drrr!)- 90% done
Magent!Teto (Vocaloid)- 95% done