Excellent Advice to Visit Local UL club or at least visit with some UL flyers
It appears that the UL club recommended has an 1984 Pterodactyl Ascender available for $3200. I don't know why you would spend $13,500 when you could spend much less and have as much fun. Regarding the age of the plane, I built Pterodactyl in 1979 and it flew extremely well and was in good condition until I sold it a couple of years ago (and it was not always stored indoors). If you have aspirations of becoming a "real" pilot another plane may be more suitable, but if you just want to spend time in the sky like I did, a Pterodactyl will get you there with enough money left in your pocket to buy the beer when you get back. Most true ultralights (part 103 legal) will fly for hours on a few bucks of regular auto gas, are transportable using your family car (I used a Toyota Supra), and you can store them by hanging them from the ceiling in your family garage (because they fold up).
Or you can spend $13,000 on the plane, $200 each month on a hanger, and then $8000 more for your pilots license. It was a no brainer for me, but real pilots don't give us UL pilots any credit for brains anyway. Perhaps they are right? Flying a true ultralight in calm air can be as peaceful and pleasant as watching a hawk soar on the thermals. On a not so calm day it is like trying to fly a tissue paper in a hurricane.