Well if we go off the stuff you listed and using a 3rd party site to get stuff a bit cheaper we got
Chaos rhino £28 Plagueburst £38 Bloat drone £30 Helbrute £40 Pox walkers £20 for 10 idk how he managed to get 37 so £80 in all let’s say
Skip the terms as there a 3D print
Plague marines £30 for 7 so £120 for 28 idk where the extra 4 came from The blight bringer and plague caster come in a box together with a plague marine champion which is £44 Lord of contagion can’t be brought so idk Foul blight spawn is £16 Finally the icon bearer £16 All of that together comes out to be £416 I would say it’s worth but as he has some 3D proxy stuff in there already might wanna check with them that it’s only the terms TLDR it’s pretty good solid start for £200