TERRAIN WINNERMy most-used terrain is a bunch of pine boards, cut in 5, 10, 20 and 30cm sections and sprayed grey.
It cost $13 and two hours with a bench saw and a spray can.
It's so basic, yet so versatile. It is the most basic of terrain, barely a step above the "cover books with a sheet" - its low effort - and this is coming from someone who specializes in low-effort terrain. Yet I use it so much. Looking at it, I have been thinking of ways to modify it. Instead of pine boards, what about foam strips? I could texture it and make it more cave-like and organic - but I'd lose some versatility. Have not used it for multi-level games - how could I adapt the design?
There is another clear winner. These EM4 plastic starfighters have served as super-cavitating sub fighters, as micro-drones flying amongst blades of grass, and currently do service as PT-boat sized gunships/assault landers. They have starred in about ten sets of homebrew rules as well as their original game Silent Death, and have playtested games like Jovian Chronicles, Renegade Legion, 5150 Fighter Command among others.
They've gotten use at least 5-6 times a year for the last 10 years.
Even today they are $6 (3 pounds) for a dozen, including bases - 50c each! Easily the best bang for my buck miniatures, ever.
So... the most used miniatures and terrain in my shed cost under $20 combined, and both sport a single grey basecoat. *Shrugs*
Do you have any minis or terrain that just get so much use you can claim them as your MVP?