Great value Nikon DSLR: https://ebay.us/6DNpdg
Great value Canon mirrorless: https://ebay.us/6zKOIV

Buying used cameras can be a scary thing, especially if you have no idea where to begin testing the thing!

Here's a quick 30-point checklist for buying used digital cameras -- a DSLR is used as an example but it applies to any digital camera.

0:00 Introduction
1:20 CHECK FOR CRACKS OR DENTS
1:42 CHECK THE TERMINAL CONNECTIONS
2:07 CHECK PINS ON THE CARD SLOT
2:27 CHECK FLASH HOTSHOE
3:08 CHECK MIRROR FOR DUST / LIQUIDS / ETC.
3:32 CHECK BATTERY DOOR
4:11 CHECK VIEWFINDER CONDITION
4:34 CHECK METAL STRAP MOUNTS
4:46 TURN CAMERA ON AND CHECK DISPLAY
5:09 DO THE BUTTONS WORK?
5:35 TAKE SOME TEST SHOTS
5:51 DOES THE POP-UP FLASH WORK?
6:53 PLAY WITH DIOPTER WHEEL
7:13 TEST CONTINUOUS SHOOTING MODE
8:11 TEST VIDEO AND/OR LIVE VIEW
8:35 TEST CONTROL WHEELS
9:07 CHECK THE METERING
10:38 CHECK FOR DUST ON SENSOR
11:06 WHAT SENSOR DUST LOOKS LIKE
12:07 CHECK REAR AND FRONT GLASS
12:42 CHECK LENS MOUNT CONDITION
13:05 IS ZOOM RING SMOOTH?
13:12 TAKE TEST SHOTS WITH LENS
13:27 DOES LENS AUTO FOCUS ?
13:53 CHECK LENS FOR DAMAGE
14:17 OPTIONAL: TEST CHARGER