Finescalemodeler,
Your price is good. The high-value kit is the Neuspotter, which can go for several times the original price. I'm not sure you are aware of this, but a portion of the Neuspotter's mold was damaged during Nitto's infamous fire, so there will be no more reissues. (But maybe Hasegawa or Wave will tool a new kit? Never say never.)
By my observation, SF3D/MaK is a funny sci-fi niche, with a small core of really dedicated fans floating in a vast sea of uninterested modelers. I tried getting guys to try a kit or two, but so far I have had very little success.
Anyway, good luck and hope you get a good price for your stuff.
PS Anyone interested in a 1/6 Melusine? No? Didn't think so.