Cheap matting for photos?

Cheap matting for photos?

I'm selling my photography at a craft fair in November, so I'm starting to make my prints and mat them now. Does anyone know where to get cheap matting for photos? I know Wal-Mart has them for really cheap, but I refuse to shop there. I tried Michael's, but the ones I'm looking for (the frame part, and the cardboard backing to attach the matting frame and photo to) start at $6.99 each. That's not a huge amount alone, but I'm estimating I'll have about 75 prints to sell, so that will really add up. Does anyone know of a store that may have them for cheaper? I live in Maryland, btw.
More planting to do!

More planting to do!

mystery vine that’s attacking my balsam fir

mystery vine that’s attacking my balsam fir

Loooove this community!

Loooove this community!

Black Krim Tomato

Black Krim Tomato

Its an addiction

Its an addiction

Now some veggies.

Now some veggies.