sail maint.

hello everyone.
first I want to thank everyone who has responded to my earlier post. good info.
I have been inspecting my sails and have found very small holes in the bottom of my mail. when I say small, I mean really small. a couple larger ones are around an eighth of an inch across. is this something to be very concerned about? if so, is it repairable? do I need to get a new sail? can I make my own sails? what type of sewing machine and materials will I need? also, I am looking for some electronics, used is okay, any leads or advice as to where is the best place to look for used electronics? thanls again. this forum is great.