Are the instock numbers accurate

Typically, yes. Most retailers update their online stock numbers daily, in the mornings

They gave always seemed to be a accurate. This is true even for open box items. Don't forget that open box items often have a negotiable price.

From my experience, yes. I've had many occasions with only one item in stock and I would purchase said item and instantly upon refreshing the page it would switch to out of stock.

Seem to be...