You always hear the question: "How did you get into the hobby?", and for me it was getting bored with assembling fighter jet models.
I could never afford the good jet kits either, lol. Plus those things had a ton of components, we're spoiled by Games Workshop when it comes to piece count, believe me.
Back in Rogue Trader there were two official female Space Marines "Gabs" and "Jayne". Im not sure what they go for these days, but its a nifty piece of nostalgia either way.
You may want to also see this resin female sculpt as well -MBG