I don't plan to sell it at the moment, I was just curious to know an approximate value in a hypothetical sale.
About the purchase, my parents simply bought me the Christmas present because as they say, I loved "the robot series", and when they went to the store, they saw that the toy was of "metal and a lot of quality"...so they bought it for me.
I remember the box was green, the feeling of the weight of the figure. I had to ask for help to transform it
As time went by, I lost the gun (the box would surely be thrown away by my parents) and the chest plate ended up breaking....
I wouldn't mind getting a new one, new "ears" and whitening the figure.