Are these any good?
[VIDEO]http://www.amazon.com/Parker-PDF35WH-7-String-Solid-Body-Electric/dp/B00CH7T9P6/ref=sr_1_19?s=musical-instruments&ie=UTF8&qid=1376270163&sr=1-19&keywords=seven+string+guitar]Amazon.com: Parker PDF35WH MaxxFly PDF Series 7-String Solid-Body Electric Guitar, White: Musical Instruments[/VIDEO]
For $460, seems like it might be worth the gamble.
Edit: Though that doesn't appear to be a seven string.
The picture gives me concern about the quality control, as they seem to have left off something rather important for that specific model.