Having bought for $55 last month, the complete Miyata 610 pictured below, center pulls not cantis, I'm not convinced an $80 frame with a crappy paint job and bad fork is such a great deal. I'm just guessing, but to cut and replace the entire steerer tube would be upwards of $60.

http://www.bikeforums.net/showthread...ata-610-v-1000