Here's some examples of products I doubt are 100% legit & the reasons why:
e-Lab - the Vinylistics Series

I'm sure e-Lab put a lot of work in these volumes but if you have downloaded the free Vinylistics samples that we're available on the e-Lab website you have probably recognise the "Skull Snaps" break there. And here's the vynilistic mp3 demo where you can clearly hear the "When The Levee Breaks" by Led Zeppelin:
http://demo.bigfishaudio.net/demo/vn1.mp3
Did they bought the rights for these two breaks?
Electronisounds - Ambient Dreams
http://www.electronisounds.com/AmbientDreams.html
Download the demo pack & hear an Akai XE8 sample. I know it short, but I thought it was illegal to sell sounds from dum machines & sound modules. You can also recognise some other drum machine samples on other Electronisounds sample CDs. Maybe he was the original drummer for these drum machines, who knows?
AMG - Norman Cook - Skip To My Loops

Norman Cook is a DJ & if you read interviews about him you will know that he samples old vynils drum loops, cut them, re-arrange the slices in his sampler & passes the sound trought FXs. Even on the Amg websites you can read from a review: "...some loops are created from cup-ups of old favourites. Others are obviously programmed. There are several old pals..."
Check for yourself: http://www.amguk.co.uk/cds/skiptomyloopsrev.html
AMG - Coldcut's Kleptomania!

From the AMG website: "...Instead of presenting boring multi-sample sets, this release featured sounds carefully culled from a massive and well-researched record collection, lovingly assembled over a period of years. With old-school jazz and soul drum-loops, voice hits, classic stabs and breaks, here was an early and vital insight into the raw material of the dance producer."
Check for yourself: http://www.amguk.co.uk/cds/coldcutkleprev.html
I thought it was illegal to sell samples from records! And with over 1,000 samples on this disc, I doubt they are all clear & safe to use unless they have recorded & synthetize most of the sounds from scratch., which I doubt.
Dangerous Bear Underground - The Hollow Sun Classic Instruments Reason reFill
This collection contains samples from classic drum machines, again, I thought it was illegal to sell samples from drum machines & sound modules. Hollow Sun themself will sell these samples but did they have the authorisations from Roland, Akai & Linn? It could be.
As an aspiring sample cd producer I feel that this is unfair, it would be a lot more easier for me to just samples the sample based instruments & records I have than getting into all the trouble & work of synthetising my own sound from scratch!
Re-editing, slicing & passing an already existed drum loop trough a bunch of effects is a lot easier than record your own stuff or synthetising your own percussions from scratch.
Why these companies can get away with it without getting into any trouble with copyrights laws & their owners?
