I mainly recycle electronics, and re-sell some items for repair. I have a few buyers who repair and re-sell some items:
Flat screen monitors, 19” wide screen and up, TV’s 32” and up, any brand.
Laptops, anything that came with Windows 7 or newer, especially core i3, i5, i7, any brand.
Cell phones, newer smart phones only, mostly just the better brands.
These are items that I have more than one local buyer for, who are doing exactly what you are planning to do. For the right items there is definitely a market. To find good sources for items to repair, you will need to do your homework.
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