I picked one up in a recent Vectis auction at a price I was happy to pay. (420 + the Huge Vectis fee)
I saw one Echo before last at 450 GBP.
It all depends on who is seeking the figures at the time IMHO. Previous Luke Storms went a lot higher on Vectis. (480, 540 and even 800 for a clipper Trip-logo all plus 25% Vectis VAT robbery)