Why would you even wanna spend 30+ bucks if you can have the same result for basically free... there's an excellent post on this forum on how to dilute so that it's (probably, hopefully) not detectable.
I got a home testing kit including adulterate test, the dilution post works.

By the way, tried XXtra /clean before. Followed TO THE T. Didn't work for me. Again, TO THE T, so don't you guys bother telling me I didn't know how to read the directions and/or didn't do it right...

Either way, I had a test today, substituted though, cuz I didn't want to risk having a "diluted" result, and potentially miss out on 75k a year... buys a lotta weed ;-)