im selling a turbo on eBay and got a question regarding the shaft play of the turbo, not quite sure what that means, anyone know?
do you think he's referring to the CHRA?

He's referring to the bearings and how worn the turbo is.
Turbo's have back-thrust through the compressor, if the turbo has a lot of wear, there will be more shaft play than if it's newer.

thank you