Small Engines (Lawn Mowers, etc.): Atlas riding mower, mower racing, transaxle

Question
Model # R5121 Serial#LC0261 DO You Have ANY Idea How its Worth & how rare

Answer
Can you attached a picture of the mower?  It's difficult to say how much it is worth without knowing what parts the mower is built with.  I'd like to see the front axle, rear transaxle/transmission and the engine.  Some of those old mowers are used by hobby guys for mower pulling and mower racing.  

Attach some pictures to let me see what you have.

Eric