Don't bank on the Corps museum buying them either, I tried to GIVE my mates uncles collection to them, the set included a DCM and a Greek valour award. The old boy had seen service throughout the war (even on Hood). They wern't interested, very sad state of affairs.
Read the spiel that came with the sale of the medals and it makes no suggestion that Cpl Robinson has fallen on hard times. I hope that in this case he has seen that 2 gongs sitting in a drawer are gathering dust and can be put to better use in a collection somewhere.
I personally think it is sad that he is selling his medals,as they are a legacy to his military service. Having said that we do not know the reasons for the sale. There are plenty of genuine medal collectors who will buy them.
I have a GSM and PJM and i would never think of selling them,i want to pass them on to my son for posterity.