Why were you taking all the tracks off in the first place? How are you going to fix the sprockets? How much damage did you do to the other track drive components when you disassembled it? I think changing it to wheels and tires will be much quicker and cheaper.
Unless the complete track system was in good shape, I would never buy one for a flip. Too many extra parts to have troubles with.
There's just one thing I'll guarantee , the best things in life, they sure AIN'T FREE !!
88 Craftsman II Trac-Plus 10/32 [wheeled conversion]
71 Ariens SnoThro 6/24 [Predator 6.5 repower]
72 Ariens SnoThro 6/24 with original Tecumseh H60
7? Ariens Tractor with rotary mower attachment [Tecumseh HSK100 repower]