big collectibles have lost value

Is it not possible to edit first post ? I have observed there is no EDIT option for first post . Do you all get the same feature ? Or its happening to me only ?

You cannot edit it after a certain amount of time. I don't know the time, but am guessing three or four minutes. Editing, if I remember correctly, takes a lot of power from the site. Power is the wrong word - I'm no expert on computer sites.

I wrote a further answer, but lost it in the site maintenance at this site that is going on now. Perhaps your editing problem was related to that.