Nexus 5X: Decent phone. Good camera. Stock Android. BUT, it's LG. Known for its reliability... NOT. So be cautious. I wouldn't recommend unless you're getting it really cheap.
Nexus 6P: They're available around 34-37k depending on condition and accessories. Grab one if you can, the last flagship Nexus device. Stock Android, great camera, fantastic performance, overall awesome phone. I had one and I miss it.
Nexus 6: For 30k? No. These are available around 20ish. A bit old now, it's a 32-bit device so to be future proof, I wouldn't suggest it. If however you want to save some cash and still get one, the XDA Custom ROMs section will help you squeeze a few extra months out of the phone.
Moto X Style: Very good. Enough dev support to keep you going, it's a Snapdragon 808 phone, so very similar to the Nexus 5X and even has an extra gig of RAM. They're available around 22-24k. For sale in the premium sellers marketplace. Check with [MENTION=26138]hzk17[/MENTION] if he still has any left.