I would generally agree that you are spamming. I was actually considering creating a thread in meta complaining about the low quality of your posts.
Generally speaking you should only be posting in marketplace threads if you are either knowledgable about a certain item/service/ect. being sold or if you have a genuine interest in trading with the OP of the thread, or are calling out a potential scam (this would be very similar to being knowledgable about what is being traded). I can say with a good amount of certainty that most of your posts in the marketplace meet none of the above criteria.
IMO you should be banned for at least a short period to allow you to have time to familiarize yourself with the various rules of the forum and the quality of posts that is expected of members of the community
I would happily accept a short term ban, as I take responsibility for my acts.
Thanks for the feedback btw.