Not a collectors item, box means nothing in terms of value. All weather cover again adds not much value, a plastic lunch baggie works just as good.
You would not want to pay $500 for a 10 year old used one when you can buy a 1 year old one at that price or lower, if if the condition is top notch.
But on ebay, most don't know they have not changed in 10 years so wouldn't second guess they are buying an old machine in top notch condition for the same price as a 1 year old used machine.
About 5-6 years ago, you could buy a used Cortes for $250-300 in top notch condition. Since Tesoro raised the prices, people are now willing to pay more for a used machine. And sometimes crazy prices
on the Abaa auction site. In reality there are much better new and used model target ID machines on the market than the Cortes in the same price range and lower. But, the Cortes still has a good following. Had two myself over the years. Wouldn't buy another. Think most out grow it pretty fast for one reason or another.