The prices for all spa services currently availabel on property at WDW are all the same, regardless of where the treatment is done.
Nikki Bryan Spas operates all of the spa and salon facilities.
I have heard that SSR Spa will reopen over the summer at some point, possibly in late spring. Definitely not before they open the models over at SSR.
If you have transportation, I'd STRONGLY suggest Canyon Ranch over at Gaylord Palms. Some of the best from the GF and SSR/DI Spas have left and gone there. Canyon Ranch has become synonymous with world-class in spas. T&L recently ranked spas and Canyon Ranch dominated the lists.
What ever you do, you probably won't be able to get away with less than about $100 for a massage. If you want to get her a manicure/pedicure, TC who used to be at the GF Spa has left and now operates a mobile manicure/predicure company. She'll come right to your room, and give the same spa style manicure/pedicure that she would have given at the GF Spa, including the same products, for about 1/3 of the cost. Let me know if you want her number. It will cost you under $50 including the tip (for both services, not each!), and her work is wonderful.
Anne