I bought one unlocked from Expansys for 600$ last month. I was really happy with the phone until today. 200$ price drop was unexpected. Event the Nexus S, which

I bought one unlocked from Expansys for 600$ last month. I was really happy with the phone until today. 200$ price drop was unexpected. Event the Nexus S, which is a 2 year old phone is available for 350$ on Amazon.