Changing dwarf into hafling

[Ahchan90]

As hafling give a bonus on selling 1 item double of the price.

My question is.

If i am currently a dwarf and i have 2 big item on play. its my turn

I wish to change dwarf into hafling and i wish to sell 1 of the big item at the same time.
Example the item is value at 500 gold

So do I get the bonus to 1k gold since i change to halfling Or i dont because when losing the dwarf race i have to first get rid of the extra big item?

Thank you