Well, squareneck or roundneck? I assume you want one with spider bridge? Some good cheap ones are Regals(pretty good sound, fair quality) or if you really want a cheap one, a Johnson. Hit a few licks on a squareneck Johnson recently and it sounded surprisingly good. My next guitar purchase will be a squareneck Regal. They're all over the place on ebay. My experience with import resonators has been that you can get better sound by replacing the cone with quarterman and then setting it up yourself. $700 is too much for a cheap one and too little for a really good one.