Here are some great deals for the PlayStation VR (PSVR) which is still the cheapest way to get into non-mobile VR experiences.
Newegg has the PSVR for $369 for $30 off. However, you'll still need the camera so if you have that, then this is a good deal. Sale Ends in 5 Days on 05/17/2017.
The PSVR Bundle with PSVR worlds or horror game Until Dawn is now an ongoing bundle for $499.
Good luck in your shopping!