Ryan,
Things may be different in Iowa, but the '67/68's that are actually BRINGING $3 to $5K are decent drivers that generally don't have visible rust, original 289 or even 302 conversions, decent original paint, decent original interior, all parts in place, etc. The ones that have clearly visible rust in critical structural locations (battery box, hood support, spring boxes, floor pans rusted through, etc, etc) are going for much, much less, and those with missing major panels (fenders, hood, doors) are salvage value. A decent, original paint, V8 auto or 3spd coupe, not restored will be less than $5K. I'd put the one offered in the less than $500 range in the KC area.