War-
My game plan for a sale like that is to pick out a handful of items you see in the pics, and research the daylights out of them. For instance, there could be some real bargains to be scored with the guns, swords and pottery, but I am not educated enough to pick out a fake sword from one with a $4,000 value.
I've done this in the past, and I believe it helps in the future. I spent hours studying US Army helmets, and now know that the WWII issue helmets have a split seam on the front. The WWII issues also had different chin strap hooks than those used in Vietnam.
If that estate is real, like I mentioned before, I'm going to the sale for the stuff not pictured. That looks like the kind of estate that would have a nice machinist's vise, a WWII or early Coleman lantern or stove, an oddball book or two on early steam engines that was printed in 1983, a car jack to a 62-66 Pontiac, and a super clean 1958 license plate.
I also flea market, so sales like these are easy to pick for both ebay and the flea market.
If this a super experienced estate company, they are probably going to be on the ball with everything. But, sometimes, the estate companies are just as overwhelmed with the quantity and quality of stuff that they maybe forgetting the little stuff. Who cares about an old rusty car jack stuck in the depths of the garage when you have $15,000 in edged weapons you are hoping to sell??
HTH, and YMMV.