If you didn't cash in on the Amazon T-Mobile G1 deal, you're in luck. It's even cheaper at Costco. For only $79.99 you can get your hands on a T-Mobile G1! Yep, that's $100 off. Costco is offering the deal via the manufacturer's coupon shown above. That's just an amazing price to get your hand on a powerful, innovative smartphone.

We had originally believed that the Amazon could not be beat, but Costco proved us wrong. Do you guys think the price for the T-Mobile G1 can go any lower?

Hit the jump for the coupon's fine print!