Goodson Cylinder Head Repair Kit

Not sure if this is the right place for this, but I was browsing eBay today after talking with 2INSANE about cylinder head cracks and came across this Goodson repair kit. Looks very similar to the Lock n Stitch kit with the brass sleeve inserts. From what I hear this one has been long discontinued, but it looks unused. A little steep, but half the price of the currently available Lock n Stitch.

https://www.ebay.com/itm/164836568578

Attachment 6045

Cheers!