Over the years I've kept an eye on the prices original copies of MSSM make on Ebay & elsewhere. 10 years ago it wasn't that unusual to see them making £20+ and some went for £50+ but in recent times they mostly seem to be going for around £10 each or thereabouts.
So I was quite surprised to see this one go for a premium price, it's certainly not a particularly interesting issue but perhaps two bidders needed it for their collection, who knows? A digital copy is available here for £4.
Just small update, MSSM Num 161 sold for £34.50 on Ebay tonight (23rd Aug 2018) so I guess there are some new collectors in town.