To be honest I would be a bit concerned, the pictures actualy show faults on the models. How do I know, because if I have a faulty model on Simplyfi3D that is what it looks like.
At 1/87 it may make a credible scale to 1/100 but bigger than that and it will look poor (some features will look to big) and it will be scaled to small for items like gun barrels for say 1/144.
I have looked at the Unimog and Marder STL's on Thingverse and they are not what I would define as good models. My 3D printed AOTRS Shipyards model at 1/144 has more detail!
To be honest I am not sure that its good value. Yes I pay more for my commissions, typicaly £50.00 GBP, each but they are much better detail and optimised for my scale (1/144).
If a few folk got together you could commision a models that were better for the same value.