It all depends on how aggressively I've priced the gear for sale. I rarely use that statement, as it does convey a bit of arrogance. Better to say "firm and fair" or "a little flexibility with the price" if that is the case. As a buyer, I am very wary of companies that routinely discount their products by 40-50% based on MSRP, yet somehow make it sound like it's a limited time offer. Seems to be more associated with cables and various tweaking accessories.
Does it make sense to "ignore low ball offers"?
Assuming the person wants to sell the item and is accepting offers (since he didn’t say the "price is firm") then why say "I will gladly ignore low ball offers" ?
Why not make a counteroffer to the low ball offer? Thats how cars, houses and most anything that doesn’t have a "firm" price is purchased.
If its because the seller doesn’t want to waste their time negotiating they should say so or simply grow-up a little bit and not get so easily offended by a low offer. Besides, a buyer has no idea what the seller is willing to accept unless you negotiate it.
I’ve sold and purchased a number items after negotiating from a low first offer.