I think you're asking the wrong questions.
1. You're talking about used trailers. The quality of a used trailer has little to nothing to do with who built it. It's all about how it has been maintained. Your questions should be about what to look for in a used trailer.
2. Any tow vehicle (1/2 ton, 3/4 ton, 1 ton, etc), doesn't matter who built it, will have varying amounts of payload and tow capacity. F150 for example, can have payload/towing numbers anywhere between 750/5,000 lb and 3,200/12,000. Where an "everyday F150" fits in that range, is really hard to say.
If you already have the F150, you need to know what it is rated to carry and what it is rated to tow. Then look for a trailer that fits (weight wise) with the truck's ratings.
Things to keep in mind:
Any weight added to the tow vehicle (aftermarket accessories, people, pets, cargo, hitch equipment, and pin weight) takes away available payload, pound for pound.
Pin weight will be approximately 20 - 22 percent of gross trailer weight.