Where to buy Bicycles in SD

Where is best place to buy these. I won't be there for awhile but need one for an 11yr. old boy and something for my 3 year old (small one with training wheels). Idea of prices.These will be used in the campo. Thanks

Thanks JD!! I checked out the above. Glad I was sitting down. Good bikes for pros or semis, not for kids in the country. I'll have my wife start looking at your suggestions. It appears the 12" with training wheels is what the 3 yr old needs and 26" for the 11 yr old. Do you agree? Thanks to all.