$500 - $1,000 Ukuleles
Now we're really in business. You should be getting a high quality ukulele for this amount. There are a few Hawaiian makers who produce ukuleles in this range. Some of the most highly respected include KoAloha, Kanile'a, Pono (made by Ko'olau) and Sonny D.
The lower end vintage Martin ukuleles usually fall into this price range (the Style 0, Style 1 and possibly a 2M).