I'm not sure it's a collectable but it is good, well spotted Beetroot, I might have to buy one.
I think James some make some fridge magnets to raise money for the excellent work he does, with famous pictures of SE1 from the forum; the student hall of residence, that crossing they want to get rid of on Tooley Street, the countdown at the crossing on Blackfriars Road and, hmmmmmm, oh yes, a cyclist on the southbank.
I like Banksy's work and enjoy finding ones still visible in various parts of London. But the very nature of it means it is susceptible to being removed, covered over, destroyed, etc. I believe Banksy puts the works where he puts them in the knowledge they will probably be transient. So regarding the Grange mural, if the building is demolished, the mural is lost; so be it.
I recall seeing this go up opposite the vet shortly after hearing my dog was unwell (we saw it immediately the next day after it had gone up, while taking the dogs to the surgery). I found it oddly touching that the picture of a man with a dog was opposite the vet and and I was one of the people asking for the plastic to protect it, because it felt right that it was there.
I have visited the vet often since and would look at the painting. I find it surprisingly sad that it will be moved and I would really like to find a way to keep it there.
I personally would love it to stay as one pillar of strength as we watch the community in which we live become descreated by the greedy council memebers being wined and dined by developers.
The owner of this - Joe Ozlala, is really community spirited and generous to how he has protected it since he appeared and now asking for a consultation amongst local people. This is something wonderful he has given to us.