What's the best audiophile headphones for under $300 (used)?


There have been some incredible headphones launched a few years ago that still deliver amazing quality for the price and the great thing is that these can now be found for under $300 when they originally cost more than double when they launched.

Now the question is which are the best audiophile headphones that can be found second-hand under $300. What are the best price/performance models?

Here is a selection of some of the best within that price range:

https://www.linephaze.com/selection/2683900f-e9f7-406b-b365-95cb2b1e9ecc

Do you own any of these, and would you add any additional ones?

lionel_hersch

These are recent headphones...

My prefered one are vintage one:

Sextett AKG K240 and my first over all others i listened to by far :

 AKG K340...

 I used the Koss KPH 40 for walking outdoor because of light weight and confort or for the computer  youtube interview...

I used the Fiio FT1 to walk inside in winter because of his passive isolation..

I used the sextett for documentary, movie and computer  use....

I use the K340 for real quiet music listening sacred session...

This rare  hybrid now was the best audio purchase in my life... All other audio gear are replaceable not this one ...

ABSOLUTELY 1000% NO DOUBT ON THIS PLANET & as already mentioned by @vrao81,the HiFiMan Sundara & you won't have to wear something already worn by someone with unknown hygiene...
HOWEVER,the HiFiMan Ananda Nano can be had right now for $319.00 & is a BIG step up from the Sundara with better staging & deeper bass!

I have about a dozen sets of headphones, with some costing 10 times what your budget is.  Having said that, the cans I listen to the most are the Sennheiser HD6XX.  They are super comfortable and easy to listen to.  The HD6XX is basically a HD650 with a slightly different look.  You can get them for under $200 at Drop.  Get some better earpads and get the Sennheiser balanced cable if your headphone amp supports it and you'll have a great set of cans.