Sometimes called bargains and sales or personal mortgages, these books describe personal property bought and sold on contract; such as, pots, pans, wagons, animals, bedding, clothing, furniture, tools, and machinery.
 

Auburn:
Auburn/Ward Town Records 1832-1849. 234 pages.
Though mostly a record of personal property mortgages and deeds, commercial transactions appear, also; e.g., Norwich & Worcester Railroad, pages 119-136. Fiches 37-40.

Brewster:
Brewster Record of Mortgages 1846-1932. Book 2.
Book mostly contains records of personal property mortgages. Fiches 50-57.

Ludlow:
Ludlow [Bargains & Sales 1836-1865]. 662 pages.
Though mostly bargains and sales, with related chattel mortgages, these records also include notices of sheriff’s attachments, court dates to resolve disputes, and real estate agreements. Horses, cows, hay, furniture, tools, and equipment are examples of the kinds of mortgaged property.  Fiches 27-35.

Nantucket:  sample
Nantucket Personal Property 1834-1839. [Book 2.] Fiches 165-170.

Nantucket Personal Property 1839-1846. Possibly Book 3. Fiche 171-176.

Nantucket Mortgages, Deeds, Bills 1846-1853. Possibly Book 4. Fiches 177-181.

Nantucket Mortgages, Deeds, Bills of Sale 1855-1867. Fiches 182-183.

Nantucket Personal Property 1853-1873. Probably Book 5. Notices of women in business are sometimes found in this type of book; e.g., Sarah Sweet (Mrs. J.N.V.) doing business in 1873 (page 351). Fiches 184-189.

Nantucket Personal Property 1868-1884. Vol 6. 354 pages. Another woman in business is Hattie L. Brown (Mrs. Albert C.)--page 291. For indexing, see Volume 7. Fiches 190-195.

Nantucket Personal Property 1882-1894. Vol 7. 552 pages. Look here for inventories of the furnishings of various tourist homes; e.g., Veranda House and Springfield House on North Water Street.  Fiches 196-205, 216.

Nantucket Personal Property 1894-1908. Vol 8. 588 pages. "Massachusetts Standard Ink used in this book for the first time on Page 24." Fiches 206-216.