My DIY Star Wars display case was built by using Ikea Ribba 16″ x 20″ picture frames as the front glass. This was a very economical way to build the frame as the Ribba was under $15.00 CAD. Flipping it sideways gave me enough room for 27 vintage figures in each display case.
Ribba Frame 
3″ x 1″ boards cut to length for sides and top 
Shelf holes drilled for shelf pins. Note: set drill depth (I taped the bit) to not go through 100% the wood. 
5mm shelf pin test in place 
For the shelves I used a hard wood to prevent sagging. While keeping the shelves as things possible. 
I glued the wood edges and nailed into place. Then added a thin back board. Note: check the squareness to ensure it matches the frame. 
I painted then added hinges to the top. 
I chose a yellow for the inside as a tribute to the original card backs. I brightened it to match the room and lighting conditions.
The finished piece.
Each shelf has 5 inches head space. The top shelf being 5.125″ high which accommodates IG-88 quite well. The 3″ wood (in actuality closer to 2.5″ as wood is not the width it has on the description) fits all figures well. If you have a table saw you could probably rip the wood an other 3/4″ for a lower profile. This case still has room for approximately 12 more figures (assuming 2″ per figure – 9 figures per shelf ). Build 3 cases and have all your vintage Star Wars figures displayed as the art they are.
Note: I’m sure this type of display case would also work with other collectable figures such as G.I. Joes.
These frames also come in a variety of sizes to suit other projects.
Darwin Design 