What is a good price to pay for a 4 year old ys640 on a competition cart?  some exterior rust and the grates have some rust.

Picked it up today.  It is a 2014. 

Congrats, I'm sure you will get many years of use out of it.

Congrats!  Where are the pics?  Does it need any repairs or love and care?  What do you plan to cook on it first?

Will get pics soon.  It has some rust on the box and grates, but the cart is  in great shape.  I got in late yesterday after a long drive.

What did you have to pay

$800 for a YS640 on Comp Cart, and a cover

 Nice find.  I as well would be interested in photos. Preferably as is, then if you do anything to the pit, post pics.  Have fun!

$800 for a YS640 on Comp Cart, and a cover

That is a deal!

Here are some Pics:
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It needs to have the fire pot recaulked, and I need to repaint it.  I will work over the next two weeks to get it in good shape before cooking on it.

It also came with a Yoder cover.

 

agreed!  Nice find and should be easy to clean up!

Great deal!  Will clean up nicely and be a trouble free unit for years.

Check the diffuser for warping, consider getting the two piece diffuser, nice to have for perfect steaks. 

Ohh and grill grates too.

Their built like tanks - it will clean up nicely and that rust is nothing more that a bit of surface rust.
Mine was much worse and I was able to restore it to near new.
Kinda wish I didn't sell it but had too many smokers