Crafts, Etc. has them for $19.99 with free shipping over $25. Scrap-Mart has them for a bit more ($26.99 for two of the newer cards, the others were $19.99 & $21.99) and free shipping. Between the two sites, I was able to get 19 cards I wanted. I couldn't get Fa La La, Home Sweet Home, Spring, Think Pink, Travel USA, and Words & Expressions Holidays, so if you're looking for one of those, you'll have to search elsewhere (and please let me know if you find them on sale!).
What is M's website, please? I didn't know they had a web store!