Guild Wars 2

I found Evon Gnashblade in the vigil keep, he sold me a statue for 50 silver, however I dont have it in my inventory and it doesent seem like it was in my home instance either. Anyone that knows what this is, and why Evon seemed a bit nervous when offering it to me? My friends doesent seem to get the same offer when they talk to him, is this caused by any previous living world or some achievement?

It appears right in front of him, it allows anybody to grab a high level buff from him.

I just found out what it does, it apparently places a maintenance oil station at the side of him which gives the person who claims it a buff for 1 and a half hour