Hi Al -
I collect wargaming rules in a modest way. I have a fair few of the titles in your list, and in my experience most wargaming rules generally go for between $5-$10. There doesn't seem to be any super-rare books that will go for big money (not that I've seen anyway).
The most popular wargame titles are anything TSR (because of the D&D connection I guess), so Tricolour, Air Power etc should do OK - perhaps $20-30 each. Is the DGUTS TSR or Guidon? - Guidon will generally fetch more. FGU and WRG titles will also do reasonably well too.
Other titles by obscure companies or unknown authors (which in the D&D world mean a hefty premium), have the opposite effect in wargaming - they won't bring much at all.
I'd be interested in a large chunk of your list - if you're open to an offer,
PM me and I'll match your list to mine and work out which titles I'd be interested in.
Regards
Mike