Depends on the severity of your wounds, really and the talent of the Magician. I'd recommend having a Bear shaman help you instead as they'd be more willing and inherently better at it. Remember, the caster will want money up front, regardless of how well they healed you. They will probably charge you more money based on having higher cyberware or a bunch of drug abuse (lower essence) Keep in mind also that a force 3 Treat Serious wounds will ONLY heal 3 boxes of damage. Good luck finding any magician that will cast a Force 10 Heal or Treat Deadly Wounds spell. Even then, they probably won't get enough successes on their test to heal you and resist the drain. In the end, it's better to have someone with First Aid treat you on the spot and then look for magical healing.
As for the rates, those really depend on the nature of your campaign (Dead Broke or Monty Haul-style) I'd say charge 500 nuyen per force of the spell times a multiplier for the damage level of the wound. So a light wound would cost 500 flat while a force 3 moderate heal would cost 3000. A deadly wound might end up costing 50,000 or more.
Don't forget that only nanotech or surgery will repair Stress points to cyberware. Bioware can be healed by magic though.
