Trends in value of vintage / used audio equipment?

I like meters of all kinds I got some old carvers that have meters.had to watch ferris buhlers day off just to see them again.have the nakamichi  flip cassette  deck seen in another movie.it makes me happy. Better than drugs and etoh because it lasts.enjoy the music and life.

Its been a buyers market for 3 yrs or more. One must have a very desirable piece  and/or have a fire sale price on it to get a bite or sale

[[data to show trends in the value of vintage and used audio equipment (high-end or otherwise)?]]

too vague a question without referencing a time range...

I am happy to pass judgement on thecarpathian for no reason, I am happy to even just make one up! 

The bids on old Yamaha, Denon and Marantz, Pioneer, Onkyo, Technics, Adcom amps and receivers are going through the roof on shopgoodwill - meaning well above ebay prices. 2-800 bucks. Sansui and Nakamichi are another category, they sell for way higher.

Which makes me think they are not reselling them, necessarily. I think they are worth those bids but they are no longer great deals. 

There are a fair amount of newer gear, Peach Audio, NAD, Rotel, Emotiva that sell for less than their ebay values. 

Not sure if it's a trend. But e.g. a decent Denon receiver for 300 bucks is fun toy, will drive any speaker and easy entry into hifi. 

I am absolutely disturbed by all the youtube videos of warehouses full of vintage hifi gear. They should be used and enjoyed by would-be audiophiles. 

@thecarpathian 

Meters are definitely a selling feature.

How much would the sales of McIntosh decline if they ditched the meters and black glass. 50%?

PS. This may seem like a bit of a dig at McIntosh, but is more a comment on successful marketing campaigns.