Yeah i sometimes feel the same like what if i buy a 2nd one and sell it with profit so i can buy something new? Tho i usually end up not buying extras. Or if i damage one i sell it and buy a new one undamaged ^^
I also enjoy selling figures after a while that i lost interest in after some years but well taken care of and enjoy seeing someone else happy with the figure :)
Tho i prefer selling locally over mfc cause many users just ask ask dont buy or if buy expect me to ship it as fast or even faster than a shop would.. open cases etc.
Never had those problems locally :) so i focus on there