Depends.
Welcome aboard, Calvin,
Yes, if you build any thing other than a -6 since they're superseded by the -7. For this reason though, you can get a lot of airplane in a -6 if you buy a flying airplane and save a lot of money over a -7. As long as you equip the airplane well, I mean a glass cockpit, good modern radios, interior and autopilot. Then you might make some money but after two to 5 years of building, a $25,000 profit on your money is ok but might be hard to make. You'd get your money back if it's a well built airplane...smooth rivets, good fit of all the pieces. I've seen RV's that were terrible examples of builder lack of skill/care with the same amount of money invested as a really clean, well built one with good color matching paint.
Regards,