space lego price guide?

Hi,

I've still got the space lego that I had as a child, and I'm wondering if it's worth anything nowadays. In particular, I have:

All have the original boxes and instructions, although some of the boxes are in rough shape. I spent many hours playing with this stuff, but was always careful not to lose any pieces or to let it get mixed in with my regular Lego.

I'm not really interested in selling, just curious to see what it's worth before I put the box back up on the shelf for another 20 years.

Thanks for any info.

Brent Mooney sportridersATsasktelDOTnet '86 CBR400R Aero