I know a lot about this set. If you had posted it in the football forum on this site you would have gotten lots of responses. That's where all the football collectors hang out, not up here in baseball land ;-)
The set is fairly difficult to put together but certainly not impossible. Most of them go for between $100-$250 with a few more commons going for less and a few that are very difficult and can run up to $500+
There is a complete set of these for sale on ebay if you want to check it out.
https://www.ebay.com/itm/1935-Nation...gAAOSwLVFbnVli
This set was purchased from an auction house for $3,100 so somebody is trying to flip this set for about twice what it goes for at auction. Needless to say it has been sitting on ebay for quite some time now at that price.
The Pittsburgh Pirates premium is a bit on the tougher side compared to others in the middle.
Hope this helps.
jeff