Paypal Payment link

I have set up auction for buy it now option. Is it possible to redirect user to paypal when he clicks on the “Buy Now” button. Right now I am sending email with payment instructions.

When I tried to used shortcode [wpapayment] for auction payment it didn’t work. Can you please let me know how to make this shortcode working?

Thanks!

https://wordpress.org/plugins/wp-auctions/