Used farm equipment can be purchased at farm auctions, through farm equipment dealers (especially tractors), or found through website listings such as Craigslist or tractorhouse.com. For tractors, combines or other powered equipment the number of hours on the unit is a consideration.
No problem, Beth! A general rule to follow for a follow-up email to an application is to send it between three to five days after you submit the application. You want to give them enough time to receive and possibly review your information.
If a deadline for applications was provided you can follow up in about 3-5 business days after the deadline - just asking about the time line. If no deadline was given then contact them in about 5-7 days after you send the application. I typically recommend that people follow up a week after their submittal.