[Timothy (in VA)]

I actually display my 1:24 models on a cabinet organizer my mom got from a kitchen supplies catalog. They're made of white plastic, and not really high quality, but they've got three stepped levels (like theater seating). There might be similar products made of better materials.

Ah, I found a picture. The ones I use are like the larger ones in the inset picture (with the soup cans). It's obviously not the manufacturer's intended use, but it works for me .

EDIT: This place has them in clear acrylic (16th item down), and is "also useful for showcasing collectibles in display cabinets."