This is one of the reasons that customers are buying their art online. The online market is increasing with 24% each year.
The buyer will not pay any fees.
Search in the categories, or use the search engine for the artist, or use the map.
Register yourself with facebook or email.
Contact directly the artist for more information. About sending cost.
Always use the payment through PayPal or Stripe. Only then you have the protection of your payment.
After your art is delivered you send a review and a rating. This is important for future customers that want to buy.
You can follow the artist when he has made a new painting. You wiil get a email notification.