Every Aurora Monster kit collection needs the Phantom — the masked figure of the Paris opera, cape swirling, in the 1:8 scale that made Aurora’s Universal Monsters famous. This 1963 example, Model No. 428-98, is offered unbuilt and unpainted, with the black plastic parts, box and instruction sheet as photographed.
Read the listing before you buy — the seller is upfront about it. There are three missing smaller pieces (the seller names the back half of the right foot among them); with that exception, the set includes all its other original pieces, unbuilt and unused, and the listing has 18 photos so you can see exactly what is there.
This Phantom kit is listed on eBay at US $149.99 (plus US $12.70 delivery, as shown on the listing), from a US seller with over 15,000 feedback and 100% positive who ships within 24 hours.
This is an affiliate listing on eBay, shared here for collectors — see the linked product page for full details and current availability.