Original Bob Ross paintings can be found on online auction sites or from a collector. He produced a great deal of paintings, but they are still hard to find on the market as originals. Instead, many artists replicate his paintings, and these replicas are much more common, and much less expensive.
Original Bob Ross paintings are oil paintings, usually landscapes. They were originally painted by Mr. Ross on television using the "wet-on-wet" technique. This method allowed for him to paint quickly, typically in an hour or less. He became a painting instructor on PBS; his famous show was called "The Joy of Painting."