Depends whether you'd be fine doing it yourself, I've delidded two CPUs (6600k and 7740x) and both I had bought cheap delid tools from China off ebay (£1.20ish for the 6600k one and £16 for the 7740x one) they work pretty well and it's not too difficult and I had purchased thermal grizzly conductonaut and it didn't cost much at all, silicon lottery's delid service is trustworthy and numerous people have done it, it's whether you'd like to do it yourself or not.