Uship.com you give them details and can put a time limit on it if you want then shippers bid on it. The more flexible you are the cheaper the bids. I shipped a nytro from butte mt to minneapolis 3 years ago for $400 but was in a time pinch. I haven't used them for awile but all went good. Check feedback before choosing. And you can asses penalties for things like pick up and drop off times.
