If I trade in my T-Mobile Motorola RAZR V3 for a G1, will I get a discount on the G1?

[Carlyluvsyuhh[t]

OK, so I have a T-Mobile Motorola RAZR V3, and, next month is when I can trade it in for a new phone--and I want the G1! If I trade my RAZR in for the G1, A) Will I get a discount? and B) If so, how much?

Thank you!!