Ahhh yes I understand these dilemmas all too well. Early in my adult collecting I got an early G1 lot w/ the carry case and all the original brushes--clearly someone's childhood collection. I already had a Seashell who was prettier so I sold the Seashell in the lot and maybe two others, kept the rest (became the core of my new collection that replaced MY childhood collection). I didn't feel bad about it once they were gone. BUT . . . FF seventeen years. The Bow-Tie I kept from that lot is still in my collection. Or was . . . I got a new one in my lot who is a beautiful bright blue, and I think I'm keeping that one! So the one I've had for 17 years (far longer than my childhood Bow-Tie) is getting sold off soon
And I keep thinking she is feeling upset and betrayed while I imagine my other ponies won't accept the new Bow-Tie. Oh the things that go through our heads when we know rationally it's just plastic. I guess it means we have empathy though