MCS 11810 Box Frame, Clear, 8 x 10-Inch

Why is this 8x10 box frame so pricey at $10.88? Same acrylic 8x10 box frame is $3.99 at Michels Art Supplies. I've bought a few. I don't get it!

can u put photos in both sides

Do you make this same frame in 12 x 16?

I want to backlight a lithophane...can I put leds behind the picture?