Is it worth getting a budget headphone tube amp?

A review of three cheap tube headphone amps.
WATCH THE FOLLOW UP VIDEO HERE:
THERE IS LITTLE POINT IN COMMENTING UNDER THIS VIDEO - because the follow-up video contains the answers to every question that anyone asks under this video.
If you want to try one for yourself - here's a link to the gold amp on eBay
Below you'll find links to the eBay store that supplied these amps. They sell a lot of different models.
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Associated article is on my blog here: ...
PLEASE DO NOT SEND ME ANY MORE LINKS TO THE TEAR-DOWN VIDEO BY EEVBLOG
Important note. I am fully aware of the tear down video by Dave at EEVBlog of one of these headphone amps, which he kindly performed to lay this matter to rest.
My first video about these headphone amps was uploaded in September 2015, a kind viewer went on to send Dave one of the amps so he could perform a professional tear-down, which he subsequently did in January 2016.
If you haven't seen Dave's video...here's a link. ...
AFFLIATED LINKS/ADVERTISING NOTICE
All links are Affiliated where possible.
When you click on links to various merchants posted here and make a purchase, this can result in me earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network & Amazon.
I am a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to AMAZON Sites (including, but not limited to Amazon US/UK/DE/ES/FR/NL/IT/CAN)