depending on where you are, the price may vary. i got an acoustic guitar when i strated for £5 but a reasonable price wud be sumthing like
£20-30 seeing as you are jus starting off. and don't worry bout not using the electric to begin with, as with a little practice, you'll soon be jamming away on it. as i said in an earlier post, it is not impossible to learn on an electric guitar, it jus takes a little more time and effort, that's why i reccomended the nylon string acoustic