Purchased 8 3/4 rear I need some help

i learned that the hard way a while ago . so i now go by the rule of if i cant see their work in person before i spend my money on it I'm not doing it unless its a well know reputable company . mine was a custom drive shaft for a lifted ranger i was building the welds looked like drunk hillbilly supervised a 5 year old with a torch and a coat hanger . i put it on went to go for a test drive never even made it out of the driveway the rear yoke snapped off . the seller stated it could handle 44in tires and up to 800 hp i had 38s and a 2.3l that made a whopping 100 hp . needless to say i bought a welder and fixed it myself then took it to have it balanced . a $250 part in the end cost me almost $1400 including the welder .