Should I sell this car to someone or a junk yard?

I have a 1995 Chevy Lumina and I had 7 people look at it but everyone walked away without making an offer. The car needs state inspection and the most expensive thing is corroded rocker panels. Every potential buyer decided it would be expensive to fix these panels and decided not to buy. The car still runs great and I only asked $500 for it. Junk yards will give $225 in my area for it. Should I just sell this car to a junk yard or should I hope a potential buyer pays me more?