Nothing is more motivating to me then a big stack of fat quarters from one design line all bundled together. I bought a 99 fat quarter set and never regretted it. It was one of the best quilt purchases I made. Any quilter who has been to the bigger quilt shops or shows knows fat quarter bundles are not inexpensive but the value is unbeatable in what you are getting. One each of the whole design line. Bundling them in small groups and then have a discount for buying more than one group would be one option.