problem is most coyotes will relieve themselves while ina trap, some you can get urine from but not many. There are many quaility lures on the market and remember Pee can attract alot of unwanted guest!!!! Cows,deer,rabitts,coons,skunks,porcupines etc,etc. When I use coyote pee and yes I buy it I use very small amounts on a location I know to be close to the line of travel.Nothing wrong with bought urine as long as you buy it from a reputable dealer, of the price sounds to good to be ture means it is alot of the time.
Try hawbakers,Carmens,Lenons is top notch stuff. Fur Country,Carmens Pro line,the list is long. What works in 1 area might not be super hot in another. I have a few that have worked in 3 states and work well all year round. Ogormans lures are another some hit and miss but a few are top notch.