On Ebay, the going rate is about 2 dollars apiece, but the shipping is expensive. About half the cost of purchasing a bulk amount of books on Ebay is shipping.
If you ever wanted to read them, you're not alone, obviously a LOT of people loved Automobile Quarterly, collected them, and now? Find they have a shelf full that they will never look at again. Like most magazines, it's one and done.
I guess that's why so many people go to libraries, instead of buying books. Rarely does anyone re read a biography for example. And re read a magazine? Not likely.
I can tell you that I've got boxes of magazines, and likely won't ever have time to look through them again, but, I have the goal of reading through the 1949-69 Hot Rods, the entire collection of Muscle Car Review (thank you Mike B!), Rodder's Journal, Hagertys, Maxim, Razor (really good but unheard of), and FHM.
For the past 5 years or so, I've only kept Rodder's Journal, and Hagertys. I gave up on some, and some gave up on publishing. Automobile, Car Craft, Motor Trend Classic - they all quit. Road and Track, Car and Driver? Rarely have anything interesting, it's always about Porsches, Ferrari, etc test driving new cars... who's buying a new car every month? Seems overkill when people only buy a new car every 4 to 6 years.
So, does it make sense to buy a collection of Automobile Quarterly? I guess only if you then donate them to a museum library? It's not like you'll ever read them twice, I suppose if you can get them cheap enough, that you can sell them on Ebay for the same price?