As a painter of the 70s I can tell you that when these came out in the mid-70s they were probably the BEST large scale (at the time, the standard scale was 1/54th) figures of their time - they are highly prized among us older collectors (I'm 63)...I sold a few to a guy in Georgia a couple of years ago, but forget the price we agreed on - IIRC it was about 20 bux on average - a bit more for the ones he really wanted - I had a rather large collection of them in my 'Vast White Army' and knew I'd never get to paint then all...the value of each kit depends upon, as most things do, it's desirability, rarity, etc - you might be best to put 'em on flEa-Bay and see what kind of bids you get...they made IIRC, TWO large 1 or 250 mm kits - a Landsknecht & a pirate, which command a higher price than the regular boxed kits - prior to the boxed kits there were assembled kits, primed & ready to be painted (I bought a bunch at the old 'Soldier Shop' in upper Manhattan) - they are probably the most rare of the entire series...Do a Google search for a copy of their old catalogs - I sold mine with the kits...in short, YES, you DO have a small treasure trove there, but to give you an exact value is impossible...go to flEa-Bay and see if they have any...last time I looked (about 3-4 years ago) there were a number of them...DO NOT sell them cheaply...they are scarce and becoming more so as the months and years pass...feel free to contact me at my e-mail...I might still have a VERY old Series 77 catalog hiding somewhere, which is NOT for sale, but for reference
CB in FL