Cranberry Autumn by Wende and Harry Devlin*

Maggie needs new school clothes and Grandmother needs a winter coat but they have no money.  Leave it to Grandmother to come up with a plan- Cranberryport Antique Sale.  She unearths two valuable Staffordshire dogs to sell.  Will grouchy Cyrus Grape outsmart Mr. Whiskers and purchase the dogs at a cheap price?
I love Mr. Whiskers!
*Highly recommend.