It is recommended to use PayPal Goods and Services when paying for an item. There are no buyer protections when sending PayPal Friends and Family, Zelle, Google Pay, Venmo, CashApp, Crypto, among others.
That is impressive! In my limited experience, none of those denominations are easy to acquire in quantity. Love those yellow $5s. The Overland $25 uses the same Tropicana Yellow and it is sweet. Good luck finding the $1s!