The grey rigging is currently £350 (about $500) per part on BL Europe. The dish £150+. The 6.6L patio stands £6-£8 each. The Grey levers £5-£8 each. The cylinders without slots £2 each. The yellow technics right angles £20 each.
It would cost upwards of £2,000 to BL a Falcon with all genuine parts, one was on UK eBay a couple of weeks ago that had half the cockpit missing and looked like it was sun damaged on one side. It had instructions but no box and sold for £1,400.
$750 is either a scam or the find of a lifetime.