Replace inner sleeves on used records?

I just keep the original sleeve.  If it's paper that's fine.  If it's cardboard, I clean the record and put a Nagaoka sleeve inside.  There are few of these; they were popular on 1970s rock.

When I clean a record I put it inside a Nagaoka sleeve, inside the original sleeve.  Nagaoka sleeves are too thin to properly protect the disc.  They are sold for their disc-friendly inside surface in long-term storage - some of our vinyl is 70 years old now.  Incidentally, many early CDs now no longer work.  Perfect sound forever only on LPs.

These practices identify the discs I have cleaned.  I have never cleaned any disc more than once and probably less than 10% of my collection.  I clean them only when I can hear noise, on a Nitty-Gritty.

If I believe the inner sleeve to be original, I keep it and place the LP in a new quality inner sleeve.  Both usually fit inside the outer sleeve.

@kenrus , I only keep them if there is important information about the recording on them. Otherwise, they are tossed. 

I use Vinyl Storage Solution products - who are running a sale on their products.  I find them top quality, excellent pricing, and great service.

I do. after they are cleaned ultrasonically, vacuumed and they are then placed in a MoFi anti static sleeve.