Invention Submission Corp. Design copied and sold? Pittsburgh Pennsylvania

In July of 2000, I took a unique design for a yard barn to Invention Submission Corp. office in Independence Oh. I had professionally done blueprints which I displayed to their rep. He gave me high pressure tactics along with a request for about $4000.00 to "make up prints" and to patent the idea. I stated that was too much and to forget it. He asked if he could show the prints to an "engineer" as this was such a good idea, they might fund part of the cost. I agreed and after about 20 min. he returned stating no one was there. I left and about a month later received a phone call asking if I was going to go with this patent. I stated no. In the fall of 2003, I happened to be in a local branch of a large lumber supply company and lo and behold, they were selling a barn constructed exactly the same as my design. I contacted the president of the Lumber Co. and explained the situation and inquiring as to where this barn design came from. All I received was the run around in subsequent phone calls. I reported this problem to the FTC but have not as yet heard from them. Did the rep. copy the prints and after determining that I was not going to file for a patent, then sell those drawings to this lumber company? You decide. Denny Copley, Ohio
U.S.A.