I am really impressed that the whole sleeving debate has moved on far enough that nearly every answer to this thread has been fair and reasonable.
A few years back you would have got little but abuse and invective!
In a way this is a good illustration of how the devaluing of sleeved guns has reduced to the point that a well sleeved gun is usually worth a lot more than one with sick tubes.
The exceptions are with 20g and 28g guns which are often used with their original barrels long after they should have been retired.
A high proportion of the guns I sell have been sleeved, usually TIG welded rather than soft-soldered, and I believe that, although each one is an individual, they all represent good value and are excellent shooters.
Of course I could sell them for more with good, original barrels but then I would have to pay a shed load more for them in the first place so I can offer them for what I consider sensible money.