Eisel is indeed a stand up guy, I've bought several items from him; and also sold parts of my collection to him.
He spends probably 80% of his time on the road, traveling the country, to shows and to individuals with collections to disperse.
He is in "business" not a collector; and knows a moderate amount about a LOT of stuff; but is not an "expert". His descriptions are usually written by his nephew who searches their library and the net for info. Sometimes they make mistakes or miss things, - don't we all?- but have an ironclad return guarantee.
Yes, sometimes he gets crazy good prices- not his fault- it is the "bidders" and there is no "shill" involved. Equally, sometimes great items sell at ridiculously low prices- I know I have bought a couple!
If you see something in an auction description that is not quite right, send them a message- he appreciates it and if warranted will change or add to the description.