Price is a fundamental aspect for every product that is displayed on your profile. The price quoted should be all inclusive of all the applicable and relevant taxes, shipping and handling charges. If the buyer wants to buy your product from the gallery, they can add the product to their cart and pay for the product.
If the buyers want to customize the product or want to order a custom-made product from you, they will send you a special invite for that. The final price is decided once you and the buyer agree on the timeframe and design specifications. The price will definitely help as a buffer for incidentals such as shipping. Also, the cost of custom made products vary according to the needs of buyers.