Sites like bitcoinmarket and mtgox has increased the minimum amount to be traded to 10 $ .
Where could I trade for smaller amounts with guaranteed third party ?
That's bizarre. Seems that with an automated system, the amount of the trade would be irrelevant to him. Plus, it seems with many people mining and needing to trade in small amounts, all of those people would add up. Plus, when he eventually sells off to NASDAQ or whomever, he could boast many times the user base. (Many sites build a user base for no other reason.) I too would like to see some competition in this area. Not because there is anything wrong with MtGox. The guy is known and reliable. But it's practically a monopoly and I believe his site is so central to Bitcoin that the bottom may drop out if there was some huge theft or other occurance that caused everybody to panic. I felt the same way about Pool Miners and now we have several, so I no longer have that concern. Bitcoin is growing very fast and there is enough room for everybody.