I got my first Vectrex in fall 1998. The first thing I got was the Sean Kelly multicart, so when I got a Light Pen and 3D Imager, I was ready to go.
I also purchased a complete set of D.I.Y. overlays that were color-printed onto transparencies, with the opaque portions stenciled onto sticker backed paper. I had to cut them all out with an exacto knife and carefully apply each one to the transparency.
I've got one original controller so I can play Hyper Chase, and two modded 6-button Genesis controllers to play some 2-player games as well. Even with a limited game selection, this thing has a lot of pick-up-and-play value, especially with the built-in display.
"They'll never do it in time!"
"The code! The code! Figure out the code!"
"It won't be easy!"
"Cut this out second, this fourth, this first, this third."