The Marcos 1800GT is #324 and the box adds 'With Volvo Engine' in case we weren't sure whether to buy the Marcos or not. My version is the most common of the three variants: you'll find one with blue stripes (probably from a Canadian source) and there is a blue one with white stripes that has a cream interior.
One of the later models, produced from 1966 to 1969 it looks quite smart but the door mechanism leaves them quite wobbly. They fit better than Mustang doors but don't have any glazing which looks odd.
This comes with a very good original box and is available for £100 - with Volvo engine!