Considering that good used case halves go as much as $90-$100 "a piece", and higher, you definately don't want to underprice them.
I've seen some of these bike strippers asking as much for used parts as new OEM. And it looks as though the prices keep driving up due to competition between parts dealers.
The CDI is dead on my MX250, and they all want $200 for questionable used units. Rediculous! I'll spend the extra $230 for a PVL with a gaurantee.