Usually, the price of Bitcoin between one exchange and another will not be far apart.
Maybe just a few cents or dollars.
In fact, what is strange is if you accept an offer (for example with P2P or individual transactions) and you get a low Bitcoin price offer and are quite as far apart as the $ 100 difference, then you need to be careful and suspicious. because he could be a fraud. so do not ever believe in a low price bidding model like this.
Regarding where the Bitcoin price is compared, maybe you can check it based on the price in each market (in general):
https://coinmarketcap.com/currencies/bitcoin/markets/Now for some information on purchasing Bitcoin with a credit card, try checking here:
https://www.binance.com/en/buy-Bitcoinhttps://www.buybitcoinworldwide.com/credit-debit-card/probably you can also compare not only the price but also the fee/cost to spend for this kind of transaction. Sometimes, they will be different.