It was removed as you did not have the required amount of posts to place a classified and it was clearly posted in the wrong section. (not removed by me I add).
Now you have reached 30 posts, I have placed it in the appropriate section. Please read the forum rules if you are unsure of them.
That makes sense - it was probably considered as an attempt to bypass forum rules requiring members to have at least 30 posts before they can post in the Classified section.
However... no harm done, it seems. The item was on offer for yesterday only, as far as I remember (I did see it), so it got the exposure it needed before being removed - so if you had no enquiries, presumably no one was interested (or at least not interested in buying it on the day).