Broken Supex SDX-1000 Repair or buy new?

The diamond came off of my vintage Supex SDX-1000 MC cartridge.  It'll be $650 to have it retipped and aligned (Northwest Analogue in the UK, I'm in the US) Should I spend that money on a modern cartridge instead of repairing it?  I can likely afford more than this for a modern MC cartridge. Anybody have experience with this cartridge as well as modern MC cartridges between $600-$1,000?   Thanks in advance for helping me.

PS Is there someone who retips cartridges who doesn't charge like this? Soundsmith in NY is worse.