Keep looking. The persistence WILL pay off. I am the type of person who wants everything yesterday
. It took us almost two years to locate our #2 AS. We ended up traveling from southeast PA to Columbus, OH for it. So keep looking, because it is half the fun. You get to see lots of trialers and you will learn what you do an do not like.
As for your trailer age bracket, it all depends on what you are willing to spend. I could not afford a second trailer in the 3-10 year bracket so I ended up with a 20 year old trailer that is in great condition. Some say the late 80's early 90's trialers are the war-horses (for lack of a better word). They were built tough and have survived quie nicely and usually take little to get into traveling trim.
So keep look and look at lots of them. As soon as you step into the one that is meant for you, you will know it. Please keep us posted on your progress.