New to magnum swaps - opportunity came to me - is it worth it

I'd say with that intake on it, I'd go 450.00. Intake should be worth 200.00, so you going 250 for the long block. I'd think this would be a decent deal for you. That's what i see from the picture. If i was there in person and could inspect the plugs, look in the cylinders with a light, look in the valley with a light, etc. etc., I may pay him his 600.00 if i believed it was truly a ready to run motor.