Value of a Martin / Vega 5 String ???

I'm considering selling a banjo I purchased used back in 1984.  It looks like a Vega, with a Martin decal and s/n inside.  It's been unused for many years, and I'd like to determine a fair price.  HSC included.   It's definitely a "Players Instrument". Works great but has it's share of cosmetic flaws, naturally relic'ed.

more pix at    http://www.joeyace.com/banjo.htm

Thanks in advance for any info.