apple, tingting is talking abt normal pedicure & manicure. the cheapest will still be abt $40-$45 for both services no matter where we go. this price is only for package of at least 6 times somemore. the prices you quoted at good earth nail is express mani & pedicure. express means no cuticle cutting, massage, etc. every shop will have express services. good earth nail express manicure of $12 is not cheap at all. coz for some shops, express manicure is generally at $10 or so.
so we have to differentiate between express services or normal services.
french is usually $5 more ex for each service. thus, for a mani & pedicure, french wld mean another $10 more. that is the market rate.
some places like diva are more ex coz the services they provide are different & also the nail polishes that they use.. eg, OPI polishes are more ex than some other brands... wat i call "yi feng qian, yi feng huo"