I've had that happen with econ, math and some other classes...and usually instead of buying the book to get the code you had the option of just paying for the o

I've had that happen with econ, math and some other classes...and usually instead of buying the book to get the code you had the option of just paying for the online access. Like, the book would be $90 with the code, but the code itself would be $20 you can pay with a credit card (i.e. if you bought the book used for, say, $40, and you wanted just the online access). I actually haven't had a class where the book was the only way you could get access to that.