If you're looking for a ball winder, AC Moore carries them for $40.50 full retail. HOWEVER, you can go on line to the AC Moore site and print out a 40% off coupon, which is good for any one full-priced item. Call your local AC Moore first to make sure they have one in stock and then use your coupon, girl!
I hope you have an AC Moore near you since the coupons don't apply to on-line sales!
If you're looking at interchangeable needle sets, check out Knit Picks Options. I LOVE my set, they're incredible to work with. I've also done some projects with Knit Picks yarns and they are also reasonably priced for the quality.
Whatever you buy, just enjoy the experience!!! And then wallow in the joy of making the beautiful things you envision!