Found a box of my old WZ minis some time ago. Found out that some of them are rare but can't seem to find what they are worth (rough est.). Found this board though and hope someone can help me. Or even buy the stuf I have

The models I have are:
GT Offroad
Venusian Marshall
5 Bauhaus Blitzers (1 hvy)
5 Bauhaus Hussars (1hvy, 1 sgt)
2 Bauhaus hussar kapitan with hvy wpn
1 Bauhaus Hussar Kapitan with Plasma
1 Max Steiner
1 Valerie Duval
7 Venusian Rangers (2 sgts, 1 kpt)
1 Cartel Agent Michaels
1 Cartel Medic
1 Capitol Free Marine Sniper
2 Imperial Blood Berets
1 Imperial Sean Gallagher
1 Imperial Wolfbane Commando w. shotgun
1 Imperial Wolfbane Hero
1 Imperial Trencher LMG
All are 1st edition.
Most of these are not rare but the GT Offroad and the Marshall I haven't been able to find anything about.
Please reply if you can help me.