I'll say this - add at least $100 to the price to have it built-up by a competent bike-mechanic. Then add the cost of all tune-ups and parts that break the first year - and all the next years, too. No warranty that does you any good comes with a mail-order bike. I strongly urge you to reconsider and buy from a store-front bicycle store/shop.

If you just put it together ("It don' look two hard 2 mee...") without knowing all there is to know about how and why - you will have a serious problem on your hands - and under your butt.