First, your stepmother was likely not appointed Executor as an Executor is named in a Will - she is likely the administrator or personal representative - no big deal but words matter.
Depending on the type of probate administration - simplified vs. supervised - the court may or may not need to be involved in ongoing affairs. That said, however, an admin. has a duty to maximize the value realized for estate assets considering all facts and circumstances. So, just because a sales price may be low, you must consider that price in light of all relevant facts. For example, you would typically be better off to take 10% less for an asset that might be hard to sell rather than risking the market getting worse, continuing to pay taxes, insurance and maintenance, etc. However, if a price is ridiculously low, and/or if the assets are sold to related individuals and/or friends, you should bring that to the attention of the court for review. At a minimum they should offer the assets to the family at the same price they are willing to sell to unrelated parties - I am sure you would have paid $1100 for the Corvette - a 10% increase to the overall estate - not bad.
Good luck..
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