Airport Specials - An actual example

Flew VS1 on Thursday. Flight was full in all cabins except J. Went to the ticket desk at LHR on arrival and asked them about paying or using miles to upgrade to the J cabin.
I was holding a K (PE) ticket which is most restricted and cost me around £900 return including taxes.
£1000 per person one way to upgrade to J outbound. I asked about any 'airport specials' and was told that this offer was one
£400 per person one way plus 20k miles to upgrade to G outbound. Again an 'airport special'.
I did not take them up on either offer. The ticket agent was very friendly and helpful so no issues here. I just was expecting the upgrade costs to be less than this. I could have bought a Z ticket at the time I bought my K for £1800 and I could have bought an S and upgraded to G for around £1200. So both airport specials are greatly more expensive considering the amounts quoted were one way upgrades.
Seemed odd to me as the J cabin had space and I am sure they must have OpUp'd people.
Paul
I was holding a K (PE) ticket which is most restricted and cost me around £900 return including taxes.
£1000 per person one way to upgrade to J outbound. I asked about any 'airport specials' and was told that this offer was one
£400 per person one way plus 20k miles to upgrade to G outbound. Again an 'airport special'.
I did not take them up on either offer. The ticket agent was very friendly and helpful so no issues here. I just was expecting the upgrade costs to be less than this. I could have bought a Z ticket at the time I bought my K for £1800 and I could have bought an S and upgraded to G for around £1200. So both airport specials are greatly more expensive considering the amounts quoted were one way upgrades.
Seemed odd to me as the J cabin had space and I am sure they must have OpUp'd people.
Paul