Woooohoo, Jerome, sounds promising! Thanks for responding so quickly, too.
Yes, as far as I can tell, they're all more or less the same, ul/li etc. Some Javascript must be loaded, but that's almost it. The rest is styling.
Where I fear for losing my last hair is how the ul/li's can be generated. Imagine a dynamic product inventory across several categories, worst case changing continuously thanks to "Market" and a growing family of vendors with each changing product offerings. Images. Prices and at least product names. You don't want to sit and type it all in AND keep it up-to-date, there's got to be some automatism, script or so to pull the info together and generate those ul/li's...
Categories would be the "tags" for the grouping, then sorting by date, price, perhaps location ("zone"), to name some.
How? Where? When? Unless extremely simple, with what else is on my long to-do list, I'd pay for it... and you bet you'd have a lot more people jumping up and down here if HikaShop would have it "on board"...! Again, I'd be the first to immediately buy the mentioned licenses.
Got more hints? Go make my day! Thanks so much!