This is my Planet X Heavy duty canvas soft bike bag/case.It is about 8 years old I think ,it has faithfully carried my M5 to japan,and New zealand and a number of trips to morzine.It does not have a reinforced frame and is a bit scruffy .It is however undamaged other than a small hole on the inner shiny fabric where the wheel axle has rubbed through.It does not go through the outer canvas.
A wash and brush up is all it needs to look better.It was over £100 when it was new.
I dont think £20 is unreasonable,or just make me an offer
The problem might be getting it to a buyer  as postage is likely to be more than the sale price,However if anyone wants it and you are close to or live in Warwickshire drop me a message
All the best