I also have never sold or traded any of my toys too.
From very early in my collecting, I've always been very picky about what I buy:
- Unless I really want it, I won't buy it.
- I never buy any repaints unless there is a very very special reason. So, if I really like that toy, I would only ever buy Bumblebee and Starscream and never Cliffjumper and ect.
-If the same character mold comes in a bunch of different decos, I just pick the best representation or accurate version of it and maybe pay a premium price i.e., Henkai Ironhide and Cyclonus if it really warrants it.
-If it's a updated mold of the same char, i.e., deluxe movie Bumblebee, it would have to be a vast improvement over the movie 1 Concept Camaro for me to get another and that was Battle Blade Bumblebee. So, of all the movie Bumblebees I have only 2 deluxes and that's fine because they offer different things.
- If it's the same character in different size classes, I usually go with the most show accurate version, and if the bigger or smaller version offers something different or more accuracy, then there's nothing you can do about that
i.e., HA Bumblebee. But again, that is if I really want that toy.
However, one of the few toys I passed on and always always regretted is TM2 Blackarachnia. All these years and I still haven't gotten around to fixing that... I should do something about that.
Those are the guidelines I enforce on myself and I'm sure some of that is what you guys follow too. I hope this info. somehow helps you out with your dilemma.