Only VISA debit card allow Pay Pal fund to be transfered. You do not need both Al Rajhi or Public Bank Visa Debit Card. You just need Public Bank Visa Debit Card.(M not sure whether Al Rajhi debit card is Mastercard or VISA and if it is VISA,you got to reconfirm that it allows online transaction, pls reconfirm with bank but I am very certain that PB allow Pay Pal verification and also transfer fund to the VISA debit card issued by PUBLIC BANK) Each transaction is subject to USD5 n max USD500 per transaction.Well, I suggest that if you have lot's of fund in Pay Pal then u make the transfer otherwise not worth it. Make yr own calculation.

Lastly, if you have debit card why do u need to buy fund from anyone. You can use debit card to make payment whatever you purchase online that uses pay pal as long as your debit card has sufficient fund otherwise just go to the bank to top it up. And you can use your credit card to make payment too if you have.