I have some ideas to improve on Mt.Gox. I was speaking with a programmer friend of mine who is not very familiar with Bitcoin; He looked at Gox and told me that it would cost over $100,000 to code a site like Gox. Does that price sound correct?
No. Trading engine of MtGox is not very good written, I wouldn't give more than $5,000. But a good one should cost something like 100k.