Edited to update: 
I'm hoping to hear about others' experience with the German Death Layer breed of chicken, which lays steadily all the way through to old age.  I have read that they would prefer to roost in trees, so I'm not sure if they would just live outside the coop at night, if you had a total free range situation?  Or somehow a big enough enclosure with trees inside it?  A shy chicken sounds like one thing, but one that will prefer not to roost in the coop with the rest of the flock sounds like it might be a tricky situation to manage.
Any thoughts or input on the breed or ones with similar temperament / behaviour much appreciated!
---Original Question Below---
So thanks to this wonderful thread I was perusing,
https://www.backyardchickens.com/threads/oh-craigslist-you-amuse-me-so.436863/
I thought, "Oh yeah, let me just check Craigslist for... whatever.  Punch in 'chicken.'  See what comes up."  (There's a vintage nesting box I have my eye on that someone wants way too much money for, IMHO, that I keep checking on...  Anywho.)
I found a local ad for Deathlayer chicks for sale. [Or possibly hatching eggs.]  The picture looks like the silver ones, and the price is high but maybe not Absolutely insane.  I am just wondering if there is anything I should know about these chickens?  I am new to keeping chickens, and I have tended to gravitate towards more docile, easily handled breeds, but I'm wondering if trying out this chicken might be worth it?  Or would I just be in over my head?  I don't see too much information about them here on BYC.  Thanks!