NEP tokens can be obtained for free as a liquidity reward or directly swapped on the PancakeSwap exchange.
Go to the PancakeSwap exchange
Go to the PancakeSwap app
Access the Exchange feature
On the From field, Select BUSD (or BNB)
Click on the field "Select a currency".
Paste the NEP Token contract address in the search field.
Click on the link with the text (Add).
NEP Token Address:
Enter the amount of NEP or BUSD you would like to swap
Unlock Wallet if locked and then click on the Swap button