The ammo is collectable, with the Norma stuff usually bringing higher prices than the CDM (Mexican) stuff.
Collectors and dealers will offer low ball price to buy,
if they are interested, and of course, high end price to sell.
As an Auto Mag owner and shooter, I am interested, but I cannot pay collector prices for your entire lot, and I am fairly well stocked with reloadable brass already. With the recent run of .44 AMP brass from Starline, original factory ammo has become less important to those who actually shoot their Auto Mags. Everything Auto Mag is collectable to those who want them, ammo, manuals, tools, etc. Price runs from merely high to outrageous, as ( like all collectables) there is only a limited supply of it all.
I would suggest looking at ammo collector websites, and of course, Gunbroker can give you an idea of what some people are asking. Not what its worth,
but what they want for it.
I saw an empty box of CDM ammo (no brass, box only) on there a while ago. The seller wanted $35!
If there is something you are interested in that we might trade, PM me, please.