Our Sourwood (oxydenron) tree died last month and I wanted to replace it with another sweet bay magnolia (M. virginiana). I previously saw some at a Lowe's so we went there the other day and many of the trees were on sale for 75% off! We bought 2 magnolias but when I saw the price was only $8.50 each, I picked up the last one too. We then went to HomeDepot and their sweetbay mags were also on sale but only half price at $17.99 but the trees were much better looking with more foilage, didn't buy one tho. There was a lone blue atlas cedar so we bought it for 1/3 off. Several of the other plants were also on sale so I picked up two Japanese Hakone grass for shady areas for 1/3 off at $6.69 each. I saw many Japanese maples for sale but I had to pass as we already have a jungle and had most of the varieties they had in stock.
Check out your local big box stores they may have equally good sales. This is a great time to buy your plants. And fall is actually a better time to plant because the plants are not so stressed by the burning sun.