When I was pregnant MIL brought us a travel system, it was fairly expensive but she can easily afford it and she gifted it to us as our present for baby. Her son is an only child, this is the only baby we are having for medical reasons so no other GC for her to be having.
Son has now outgrown travel system - purchased new car seat and new buggy over the last few months to replace what she brought and it has been sitting in our loft unused.
With the rising costs, we now need to be making extra money, so I put the travel system up for sale on fb marketplace. MIL has seen this and said we are not to sell it but to give it back to her so she can put it in her loft to keep. We have asked her why and she just said she wants to keep it. We have explained we need the money and she has said tough. Irrelevant but her financial position is much much much better than ours to the point she doesn't have to work because she has so much disposable income and has never had a mortgage because she could afford to buy houses outright. We are talking 7 figures. We are struggling on benefits due to disability and lack of childcare (which she won't help out with because it interrupts her routine).
AIBU to think this is weird and to want to continue to sell it? I feel it was given to us to use, it has been used by us and is ours and therefore we can now dispose of it as we like?