I know little about this piece. It measures 33.5" x 69" framed. it looks like paper with a fabric silk border
Thank you for contacting Mearto and I apologize for the delay. Usually, these kinds of paintings are ink on silk. The calligraphy appears to read: 武山, which is a location in northern China. The red seal is unidentifiable. The brushwork is skillful and in a traditional style. It is likely from the 20th century or late Qing.
For paintings like this, prices vary. I have included some links below to hammer prices for similar paintings, to give you an idea of what I am basing my estimate on.