Futuristic / Monorail style trains ??

It varies on where you live. I have only dealt with Amazon, ebay is just to expensive in a majority of cases of I'm to lazy to look. All of amazons products are brand new, which will explain high prices for the discontinued items. And I would look on local ad websites as you could probably drive and pick them yourself and not have to wait for the arrival. I would use that to get blue track as most people on there aren't like eBay sellers at all. Depending on where you live this could work better or worse.
And I am not an advertiser for Amazon. im just pointing out the good about it. And their prime (two day shipping) does not operate for very few of the plarail products.
Let me reword that. You cannot use their prime system for most plarail products.