The answer to your question likely lies in the provisions of the decedent's Will. There should be a personal property provision that directs how the Executor is to dispose of personal items. If the items are to be given to you then I think you would have grounds in stating a case to receive the items and that they should not be sold. If the Will directs that the personal items are to be sold and proceeds to be added to the residue, then the Executor is likely acting within his/her rights.
The answers to your questions are largely dependent on the specific language in the Will. I would recommend you take a copy of the Will to local counsel as soon as possible so you can be advised as to the extent of your rights.
Best of Luck
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