Upload & Sell: Off
My first reply actually was my serious one. Unless you make your way into a very small elite of famous artists (to get there, it often helps to die young and impoverished), your works aren't going to have super resale value. Sure, some shysters make a decent living conning people with false promises of great "investment value" in schmaltzy hotel art (that will eventually resell for $5 at a yardsale, or be left by the curb before moving house). But I think the one most important thing you can do is keep striving to improve your photography, not worrying about tacking on "value proposition" frills. A strong photograph will sell itself.
One specific comment from checking your website: you might want to work on improving your "web presentation" of images. While I'm sure they look fantastic in actual prints, several of your examples (especially with dark foliage and water, like "Sheppard's Dell") look dark, muddy, and dull in the small on-screen images. It's hard to get exactly right, but you do need different processing for the display capabilities of a typical computer monitor versus a high quality print.