Used Stuff

https://craigslist.org/

eBay

Auction Ohio

Retail Surplus

https://www.adorama.com/

https://www.newegg.com/

https://www.overstock.com/Electronics/2/store.html

Government Surplus

https://www.govdeals.com/ – Ohio State sells their surplus here.

Watch Parts and Tools

https://www.esslinger.com/ – has lots of tools.

https://www.startimesupply.com/ – good for batteries and miscellaneous watch parts, must be a verified business to order

http://www.julesborel.com/ – see the JBC watch parts database

Cas-Ker Watchmaker and Jeweler Supplies

– based in Cincinnati, tools and parts.

Otto Frei Jewelry Supply and Watch Parts – large selection of watch crystals

Auctions

https://www.bidfta.com/bidderHome

Miscellaneous

Piano Tools

Science Experiment Supply

Mobilinkd, Terminal Node Controllers for Amateur Radio

https://www.beltime.com/

Henning Custom Watch Parts

Hub City Time

McCaw Watch Parts

Crown and Caliber

Lucius Atelier