> Given the "market price" of most crypto is based in USDT not USD it kinda makes you wonder how legit any of the "market price" figures really are?

Coinbase, Kraken, and Bitstamp are all legit exchanges that offer non-tether USD pairs. Binance offers many other stablecoins besides Tether. More than enough trading is conducted in non-tether pairs for the price to be legitimate.