Hydraulic? or electric? Check Craig's List and think outside the box. I just sold my very nice spa bed, and got a used dental chair for $500. I also found an electric bed at LCL Beauty for under $600 NEW!
I know price is high but just an example that you can use other things- He gave me the chair and I use for waxing and a few times when we did mother/daughter or Couples treatments mostly sits in corner and I use a massage table. You can google till you find the right price and piece. Again, repeating Nondy- any reason you must have Hydra? Craigslist or Scratch and dent furniture stores are always a good place to start if you want local and to see in person!
Hydraulic beds, you have to pump up with your foot. Electric does all the work for you. My former spa bed was really nice, but I had to adjust the knees and back manually. I now work in an OB/GYN practice, and need to be able to lift pregnant women from laying down position to sitting up position electrically, and I know how heavy-duty those dental chairs are.