Vladimir, 53 years old, Moscow, Russia, Russian native language, common man in the street, I write with mistakes ...
My The new Parker PM20 guitar of 2005 was bought from an authorized dealer and hung on the wall in store (most likely not in one) for several years - hence all its today's sores, but everything is treated with proper care ... Adjusted neck deflection (special thanks to Mr. Barry) used a 4mm hex and a few drops of sewing machine oil, a fine grain file for some frets to prevent the palms from scratching.
Replacing expensive jazz strings with Ernie Ball Extra Light Nickel Wound cheap ones from your nearest store
As a result, we connect to an acoustic combo (precisely to an acoustic one) and just listen to how the guitar began to sing itself
The total budget for the purchase is not more than $ 200 - it's amazing that for several years I looked towards expensive Parkers ...

But I overcame my ego and ended up leaving money for gifts for my grandchildren as well.
Thanks to Ken Parker and all of you who came up with and lives on this site.
That's all for today. All success and health!