Problem listing items for sale


I have a complete set of Harman Kardon Citation I,II,III-X  untouched kits(4) for sale,New in their boxes. I would like to sell them as a complete setup. However, I find it difficult to list them  on Audiogon as a unit.
BTW I worked for HK from 1958 through 1964. First as tech trouble shooter on the production test line and as I progressed through college ended up in the engineering lab working on the Citation line.
These kits are from my personal collection and therefore have provenance.
nickbalsamo
@nickbalsamo    If you write a  ticket to support@audiogon.com,  ATTN: Tammy, I can help you with your ad. 
Thanks Tammy,
What is the procedure to get on that site to write a ticket. I tried to put that address in my browser and it brought me to your home site of audiogon.com. I would like to offer this equipment as a package.
Thanks
When I try to list category and brand in the seller's section with multiple model numbers,it won't allow an entry
Just make the heading general, like "Harman Kardon Citation", and save the details for the body of the ad.