All this for the low price of
获得这一切只需要最低的价格 sounds very unnatural. you can simply say 只要$29.99 or 只需$29.99) which contains the meaning of minimum price without mentioning it. To be clear about "all this", I think you can use 以上(all above) or 以下 (all below) or 全部(all)

If your Chinese version referring to Chinese currency, the dollar sign is ¥.