Localbitcoins is nice for small trades to a few hundred $,
centralized platforms are better "with more than 1000 trading" but try the sites mentioned above.
However do you guys know a place or platform for p2p trades above let say 1k and above,
Any decentralized platform can be a substitute for that site, but when you are dealing "P2P", you need to trust.
The platform has nothing to do with those people just acting as escrow.
Localbitcoin is the best site that offers escrow service plus the fame makes it easy to get reliable sellers.