I've been using Niles OS-20 for 5+ years and they still sound good to me and other than needing a good cleaning they still look good too. A used set would be in your price range(sorry, mine are not 4 sale!).
Outdoor Speaker Recommendations
Setting up two outdoor zones - 2 speakers in each. They will be driven (initially) by a Onkyo TX-SR674. In about 1 month they will be driven by the Pioneer Elite VSX-82TXS. As you can tell I'm not a high-end guy but do spend reasonably on speakers - have some Klipsch IIIs and Paradigm speakers.