How hard to fix a blue pearl?

[whoozer]

I have come across a bot that needs fixing on the internet. Replacing an impeller motor, how hard are these things to fix if your pretty mechanically savvy?
I'm trying to decide if this model is worth picking up broken and fixing it myself to save $. Any thoughts?

 

[Bama Rambler]

Depends on the price. If it was cheap enough I'd like to have it just for the learning experience of dismantling it and figuring out how it worked. Then if you could actually replace a few parts and get it working would be a bonus.