The Trading Post guidelines state that the Trading Post is intended for "used, personal items" that the owner wishes to sell. This appears to be a new, demo item not owned by you that an outside dealer/manufacturer is selling.
The Trading Post guidelines indicate the approach to be taken "Outside dealers/manufacturers aka Industry Participants are entitled to create ONE thread in industry introductions. You can post any items, sales, deals, promotions in that thread only. You can not post anything with a connection to your business in the Trading Post."