Even with a specific ETA status the prospect may be iffy. It is not uncommon for a product with ETA to be stalled for months while other sites are in stock and shipping. FT has become a gamble to a greater degree over the years, but it used to be more of a quality issue or an in transit issue. Now it seems that sometimes the listings are for products they "plan" to have available rather than actually have an "ETA" on.

In stock status is by far the best bet but, even then things may go crossways.