One thing to consider here is that Amazon accepts returns. You have to pay a bit for shipping, but you could easily buy a copy of each book you might want, keep the ones you do, and still end up ahead.
Thanks. That's at least an option, especially once/if the local places close.
I will still feel bad about it. With the Borders coupons, I usually ended up spending no more than I would at Amazon, anyway. And I really like the experience of browsing. I often end up with three or four books spread out in front of me, dipping into each one, comparing their style, presentation, TOCs and indices, etc...