Another condo comp for 35 Underhill flippers

Corcoran has a listing for a 1200 square foot condo at 307 Grand Ave in Clinton Hill for $675K. This equates to a whopping $563 psf. It's a duplex 2 bedroom, 1.5 bath with roofdeck.

This would be great news for 35 Underhill Avenue contract holders as a comparable sale.

Thoughts??