I am envious of your ability to see models/potential in such random things!
I wouldn't consider myself very good at that - certainly not compared to some scratchbuild/proxying that I've seen - indeed, it's only pretty recently that I've tried, but it's certainly something I intend to do more of. In the case of the Gormiti, I bought a couple of bundles on eBay in order to use some of the playsets for scenery (something I'd seen done on some other blogs). These are actually larger projects that I realised, so I've not got round to doing anything yet.
I paid about £15 for two lots, including two different playsets and about 60 of the figures, which I hadn't really been after at the time - indeed, I sold a dozen on, though after fees and posting probably only made about £5 back. That's when I started thinking about other uses for them... A bit of research shows I'm not the first. While looking for people using the scenery, I also found people who'd re-purposed the figures:
https://kleinerzorn.wordpress.com/2015/07/24/from-gormiti-toy-to-strange-aeons-deep-one-finished/
http://leviathanwar.blogspot.co.uk/2011/02/wildling-proxy.html
http://ersico.blogspot.co.uk/2014/09/gormiti-firebellyeelclamfish.html (this one looks like someone repainting for the sake of art, rather than wargaming)
http://www.lead-adventure.de/index.php?PHPSESSID=70b28ac8ea364676abec775c69b1dbf5&topic=34912.0 (this is a conversion, using the toy as a base)
The ones I showed off are a first batch or test of concept. Sadly, quite a few of the models are rather goofy - there's an unfortunate trend for weird club-like things instead of hands - but I think I have some more that are usable and bundles of second-hand toys can be bought cheaply online or from car boot sales and the like.
I was particularly pleased with my Treeman, so wanted to make another. I couldn't find a suitable model, so I decided to try converting one, splicing together two different Gormiti - the first two shown here:
http://toyfair09.asmzine.com/galler...ibes Series 1/People of the Forest/index.html
The first, Branchtearer the Furious, was quite nice but I didn't like the heart-shaped leaf that made up his body. On the other hand, Florus the Poisoner, had a fairly suitable body, but flowers instead of a head and hands. So, I decided to perform an arm and head swap, to make a second Treeman. Pictures to follow, as I've still got some putty-ing to do on the joins, but I think it's worked ok so far...