How reliable are parts breakdowns from suppliers

[groundhog47 347]

Lately Have been adding some NOS to classified. Have been inputtin' the Toro Consumer Part number and it pops up with a specifier of units that use that particular part. As do not wish to misinform or list as something it isn't, I leave it up to the buyer to look into it also. Has anyone else used these sites to verify what equipment parts fit. A few NOS parts I've put on here for help y'all were right on the button matching exactly what the supplier says, so I have a almost 100% faith they are correct. Long story short any input appreciated. and

http://www.smallenginepartswarehouse.com/p/parts-lookup