Sites we've seen selling PulseChain (PLS). We have no relationship with them:

Tokens Express, Coast

The most efficient way to transact with PLS is on app.PulseX.com. You need a few dollars of PLS to pay for gas to use it. You can buy ETH, DAI, USDC, USDT or WBTC on Ethereum from somewhere, then bridge.pulsechain.com them to PulseChain, where you can swap for PLS with massive liquidity on PulseX. At the time of writing DAI is the best token to bridge over for buying PLS, because it has the most liquidity.

To connect to PulseChain open MetaMask and click the Networks dropdown. Select "Custom Network". Now enter the following information:
You must manually add your ERC20s for them to show. scan.PulseChain.com also works as an alternative block explorer.