I purchased a new L35 over 11 years ago, and still have it. I paid roughly $30,000 plus tax, which included an extra 12" bucket. It came standard at that time with the 18". Everytime I use it, it still impresses me with the total performance. The only down side, is the front tires, with the outside wheel on a tight turn skids, which creates excessive wear on a hard surface. If you check in the "REVIEW" section at the top of the front page, another owner complained of the tire wear also. If you use a larger radius of turn it's no problem. Reversing the seat can be a (PITA), until you get use to it. The performance of the tractor speaks for itself, and after 11 years, and not a single problem, I will never replace it.
The asking price of $16000 seems like a bargain to me, but I would check the service records, if available, also the pins and bushings on the loader and backhoe. The Kubota engines are "bullet proof", unless fluids/filters haven't been changed, or the engine has been overheated for some reason. They are a popular tractor, and if it has had reasonable care, I would jump on it for that price. I live in Northern Calif. also. If you have any further questions about the tractor, just send me a PM. Good luck!