Dude!
I ordered all my textbooks (well, the expensive ones anyway. didn't get a couple of things like class specific lab manual or a official lab notebook etc.) off of Amazon for $399.81 (I remember the price because it was just shy of $400).
Here's what I did:
Welcome to Texas A&M University*Bookstore
On the left side of the page if you scroll down a bit, you can see something where you can enter in your classes. Hopefully you have all your class info from registration so you know what sections you're in etc. (some sections use different textbooks in some cases. I know my honors chemistry section uses a different book from regular sections). So just enter your information into that box for each of your classes and then on that second page you can click "View Textbook List." This gives you a list of all the books you need. The title, author, and edition should be enough for you to find it on Amazon.
As of today all my books have arrived in very good condition. I ordered used ones off of Amazon and got some great deals. The Calc 2 textbook you need is Early Vectors by Stewart, I'm guessing. I needed it for Calc 3 and got it for around $60 and spent another $20 on the solutions manual. I think you can get them even cheaper, but I wanted a nice one. Also included in my < $400 package, a brand new Campbell's bio book (still wrapped) and my chem textbook/solutions manual, and a funny little book on running for a KINE class. I'm happy because I know I'll be using the chem and bio books in the spring semester as well.
Good luck, hope you can find some cheap ones!