There are too many crypto exchangers all over the world you can choose for buying bitcoin like for example on Binance or HitBTC the low price. You can check in localbitcoin they are low price from other exchanger.
No need for recommendation from us. You know what to do now.
You have an idea about it.
He had already make some comments which are actually right but still he decide to make another question after that.
For the sake of answering the topic, you can check out current good exchangers on the market.
https://coinmarketcap.com/rankings/exchanges/