Just rent out a storage shed and display them in there, she never has to know. Space Jam
I't absolutely my favorite "Yes, Dear" ever. Followed closely by Greg and his father's trip to San Diego Comic Con.
Patience man, patience. You absolutely have to find her something to collect. Anything. Tea cups, coke paraphenalia, beer bottles, whatever.
This is the type of arrangement my wife and I have currently. Everytime she seees me drag another bag full of figures into the house, it's just another "Pampered Chef" pizza stone, or "Longerberger" basket, or Spa day with the girls.
Early on in our relationship, there was a bit of grumbling about the dollars spent on SW. My lovely wife was concerned we were "wasting our money", money that could be well spent on other things (things that "we" wanted, and by "we", I mean she).
So, for kicks, we added up a year's worth of receipts for her "stuff" for a year (Pampered Chef, Spa Days, Salon hair treatments, etc) and all my "stuff" (SW stuff and power tools). We left our stuff like clothes/food as we'd buy those anyway. We're talking pure luxury "I gotta have it because I want it not because I need it" items.
We were both surprised to see that the dollar amounts were VERY close (within $100). After that, we kind of realized that we both have hobbies and we both have different ways to relax.
Sure, I buy SW stuff that "we" don't need, but at the same time she buys her share of stuff that we don't need. Since then, neither of us has every really groused that the other is wasting too much money.
So, to recap. She has her "Spa days" and product x Parties, while I have my Star Wars room. Everyone is happy. That is the blessing of being DINKs (Duel-Income, No Kids), which I'm sure will all change when we finally get around to having kids...