Journo, as others have said, some bookshops are going to expect a 50-60% discount off the cover price, and to have them on sale or return; but others might be happy to take them at a lesser discount, and to buy them outright (but they will want good credit terms).
Don't expect books which have been returned to you to be saleable. Many of them will be too scuffed to send on to another retailer, or to sell direct to your readers.
It's very difficult to get your self-published books into a decent number of bookshops, but a week or two of solid phoning round (don't call at busy times, and make sure you're prepared before you phone) might well do wonders.
Several independent bookshops are now showcasing self published books and many bookshops showcase books from local author: don't forget you can be a local author in a few different locations if you grew up somewhere and then moved on, so use these things to your advantage if you can.
Your books would probably sell better on Amazon than sitting on the shelf in a bookstore. The Internet has just about finished traditional bookstores.
This isn't true.
And even if it were, around 40% of books sold online are first selected in those bookshops you say are finished: so having your books on their shelves is likely to increase your online sales, too.
Makes sense. You could also send copies to the non-profit groups to sell. I don't know what facilities they have, but if they have some sort of a store front this could work well. Ditto for any museums, if your book deals with the history of the area, etc.
You might also consider getting business cards printed up with your website and your book's url on Amazon. It's worthwhile making it available as an ebook as well. There's a huge ever-growing readership that don't bother with print books anymore.
How many books have you ever bought because you were given a business card with an Amazon link on it?
Adding a link to your book on Amazon to your business card isn't likely to help you: such links look untidy and are tiresome to type in accurately. It would be better to add a scannable code, or the link to your own website.
ETA: if you decide to try to get your book into bookshops by sending round press releases and sales information, remember that you have to include a copy of the book--an uncorrected ARC is fine--along with pricing structure and ordering information if you want bookshops to take you seriously. Follow that mailing with a phone call, once they've had a chance to look at the book. And make it easy for them to get the books: don't expect booksellers to jump through hoops to get it, as it will put them off.