Yes there are, YouTube offers many a lesson in anything and is better if your the type that learns from watching rather then doing. For other methods there is anything from joining a online school for it witch can be expensive and I'd rather not get into those murky waters but there are many sites like http://www.guidetooilpainting.com/ that can help you with text tutorials.
Oil painting lessons vary greatly all over the world. They can be found online at http://www.oilpaintingtechniques.com/ or http://www.virtualartacademy.com/.
There are several places that offer free lessons. Online there's assorted websites that offer technique and color blending. There also might be some lessons at your local art museum or high school. This is done to have todays generation see the glory of old things like oil painting.
Painting themed around Christmas can best be bought online. There are various places available such as Fine Art America, Daily Painters or Oil Painting Factory.
paintingselect.com
There are a number of options available to purchase original oil paintings. Often one can attend art shows to purchase an original oil painting. They can also be purchased online on sites such as "Fine Art America" and Ebay.
From what I've seen online they vary from $300 to $1500.
Oil Change Deals are available online and are updated everyday. You can either sign up to receive special offers or get a print out of the coupon available online.
An alternative to linseed oil for oil painting is walnut oil.
A suitable substitute for linseed oil in oil painting is walnut oil.
One can purchase an oil painting of a landscape in a local shopping mall where they are usually being exhibited. Otherwise, one can order it from online stores like Artgallery and daily painters.
There are many options an artist has for selling an oil painting. Online store fronts such as Etsy or Shop Delighted allow artists to sell handmade items. It is also a good idea to try and get featured in an art gallery.
I've only seen it available online at random eStores and on eBay, never in a store.