Can't imagine a NEW shop having fabrics that are 15-20 years old ... must be from her own stash ?? Does she want to have a quilt shop or an ANTIQUES shop ?? Quilters want to see the latest and greatest, not dusty old relics ...
A good shop won't have fabrics more than 1-2 yrs old ... if they do, they shouldn't ! If it doesn't sell well, it needs to go to the bargain bin !
I like to see:
Friendly, helpful, experienced staff - Good lighting - Quilts & samples to inspire - Fabrics organized by type or groups, not just by color - Seasonal or quarterly sales - A good book and pattern selection - Variety of classes and a classroom big enough to use :)