I agree, don't build them unless you really, really want to! Collectors would pay silly money at the right place so you could buy much better quality to build. At least that's my theory.Knowing now what "antique plastic" sell for on eBay I'd just collect off-shelf, store for sale years later. Half dozen never opened 1966 first-issue Airfix-Craftmaster Aston Martin DB5s worth rhodium weight, 4th hand kit I'd bought c.2008 maybe two .9999 Silver kilo bars today.
Awesome collection and great score!