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[hunter]

I'm a little unsure why you would need to replace the lines as once you rekit the master cyl and maybe the calipers just flush the lines then theres only the one fluid, the one you've just put in.

I guess it's easier for them to replace the lines than spending time to flush them.
I brought her home today.  I'd rather use an extra can of fluid to flush the lines than to spend $$ replacing them.
They wanted to charge me for 1-1/2 hours of labor for diag.  How long does it take to check one master Cyl. and 4' on lines?  He only rode it for about 2 minutes before she locked up and even a blind man can tell you it's not the cyl. since both sides locked up.  After some talk with manager, they reduced it to 1 hour. 

What Howie says ...   

[hunter]

Just to update everyone on this:

It was supposed to be my winter project but as usual I got to work on it today.  When I took the cylinder apart today, I found about 1 tsp of some sort of thick jello kind of stuff at the bottom and in the pump section.  The stuff was dark green and like little balls  clogged up the hole between the reservoir and the pump.  It looked like looks to me like someone used grease or something like that to lubricate the seal and O-ring in pump assembly.  Some thing that did not dissolve in brake fluid and eventually coagulated.  All the lines were clean.  Just to be safe, I injected some alcohol in them and blew them with air.
After all, it wasn't caused by mixing brake fluid as the tech at Brian's said.   

All I need is some brake fluid and purge the lines then she will be good to go .