You can still buy forged Passports with RFID chip but again it what you want to pay for it !! Passports not only include a RFID chip but every country’s passports have different features, it is easy to tell a professionally printed passport from something made on a small scale. Set aside the problem of craftsmanship though, because your bigger problem is getting a passport that can be verified electronically. Serial numbers, other ID info on the passport, and the MRV zone (the line of characters along the bottom) all have internal logics to them which can be verified, even without access to a passport database. Also, more and more countries are sharing basic data with one another to verify authenticity of bio data on passports, making even the most high quality fake a moot point.
much more common (and harder to detect) is using identify theft to obtain a real document using false pretenses.