Inevitably a potential buyer will ask for a discount or make you an offer for a painting thats below the marked price. In general, Im not in favor of accommodating these requests. Practice saying This is a $400 painting, which speaks to the value of the painting. Avoid saying Ive priced this one at $400, which sounds more open to negotiation.
If youd like to make the deal a little sweeter for a customer, consider adding something instead. For example, perhaps you could give the buyer the sketch you used for the painting, a package of your artwork note cards or a small drawing. This way your artwork retains its valueand you have a happy collector.