They've only been in business since 1959, so it's definitely not an antique. It's pretty much worth what someone will pay for it, so look around Craigslist and eBay completed listings. Just because some else has it listed for $500-1000 doesn't mean it's actually worth that. I would probably pick a price that I would be willing to see it go for and list it. If it doesn't sell, oh well, if it does, yay!