I’ve suspected something for a long time that I verified by measurement this weekend.
The distance by road from the Boathouse to the nearest decent bookstore is 16.0 miles. (I live at my bug-out location, LOL.) The Boatmobile gets 16.0 miles per gallon on a good day. It takes 30 minutes, give or take 3, to cover the distance.
With gas at $2.98 per gallon (lowest I could find), it costs me $5.96 to make the round trip to the bookstore, and that’s only if I don’t count the value of my time. Actually, that’s sort-of fair, because going to the bookstore is something I like to do. I am very often shopping for a particular book when I go to the store, and I always look around to see what is new / on sale. Sometimes I am just looking for one thing, and I can call first to see if they have it, but I find that this is not always productive (computer says they have it but they / I can’t find it is the most common problem).
OK, so it costs me $5.96 to drive there and back. Amazon Prime shipping is $79 per year. [If you get it on one of their many promotions, you can get it for $29 for the first year + $50 off something you were going to buy anyway (laundry detergent), but let's not consider the promo price.] Prime gets you “free” 2nd day air shipping and low cost ($2.99 or $3.99 for most books) next day air shipping.
By selecting next-day air shipping for $3.99 (I usually do the free 2nd day, but let’s take the worst case) for a book that I want, I save $1.97 for each book I buy by ordering it from Amazon instead of spending $5.96 for gas to get it locally. After roughly 40 books (assuming one trip each, which is not that realistic; I’d probably buy more than one book per trip to the store, but Prime shipping also gets you multiple items for the same price, so that’s a wash), I’ve paid for Prime with the gas savings. If I always used the no-extra-cost 2nd day air shipping, it only takes about 14 books to pay for Prime with the gas savings. I don’t know how many books you buy, but 14 doesn’t take me very long (we don’t have a good used book store here either). Also, this assumes that the price of the book is the same at Amazon as it is at big local book chain store, which is not true; Amazon is almost always cheaper, sometimes by a wide margin.
Of course, the trick is that I buy books from Amazon that I might not otherwise buy because they are too hard to find. Oh well, reading is fundamental.
AND… books are not all that Amazon sells. I signed up for Prime late last year. I immediately ordered an exercise bike (~100 pounds) and a lead-acid backup battery (~40 pounds) and paid for next day air shipping for both. It so happened that Amazon had the best prices for both items that I could find anywhere, and I paid about $6 total to get them to the Boathouse door the next day. Not too shabby, especially because I didn’t have to heft that bike into the Boatmobile, shuffle it across town and then unload the thing. Sadly, not everything is eligible for Prime shipping; Amazon has a lot of partner merchants and they don’t participate in the program.
It amazes me that Amazon can be so efficient. Just for grins, I have lately been wondering what is the heaviest item at Amazon that qualifies for Prime shipping. Their big safes are all sold by partners. I don’t guess they sell .45-70 bullets by the pallet?