There are a number of options for used Manfrotto/Bogen tripods, which should fit well within your budget. Among them are the Bogens 3033, 3036 (3035), 3046, 3051 (3251), Manfrotto 475B, among others. I also have a Gitzo G1320 that's rock solid. The aluminum heavyweights have fallen out of favor with most folks, but I use them for my 4x5 cameras, Hasselblad, Bronica, Mamiya RZ, C330, and anything else that needs real stability. I'd also ditch the ball head. There are too many movements after you release the tension. I prefer the three axis heads such as the Bogen 3039 (Manfrotto 229), and any of the newer Bogen 3047 heads. I can lock down two of the three axes, and adjust each individually, without worrying about an expensive film camera "flopping about".