Well, before you consider selling it, why not take a look at the Sponsored Sales forum for the parts you need? You can also put out an APB (aka a "Want To Buy" ad) in the classified section.
Parts aren't too hard to come by, just takes a little research, and a question or two. For instance...
1. Are you looking for an OEM, or aftermarket front lip?
2. What type of maintenance are you referring to? The DIY section has lots of threads on general maintenance - spark plugs, oil change, etc.
3. Personal mods? Again, the DIY forum is a great place to start. Lots of low buck (or no bucks) mods to be found there, I've used many of them myself.
Don't be discouraged, you can find the help you need right here on Club xB.
Now, about that removable seat you have listed...
