I presume that by "sprung" you mean that the neck is bowed or twisted. That can almost always be fixed by rebuilding the existing neck. But it takes some skill and labor, or costs some money if you have a pro do it. Rebuilding a Warwick neck is about $600. A whole new custom replacement neck from a Luthier is maybe $800. I've done several in the past, although I'm now retired from repair work. My buddy Jeremy just made up a replacement Warwick neck here last week. There are plenty of Luthiers around who are capable of rebuilding necks or making replacements.
I suggest that you list it here on the TB Classifieds, being honest about what the problem is. See what people will offer you. They may want it for parts, or may be willing to pay a pro, or want to do the repair themselves. Here on TB, you are more likely to find someone who wants it for a project, and understands what is involved.