Definitly :

Card Warp Effect
A gold mine for practicing Sankey's Mercury Card Fold
And one of my favorites Paul Harris Immaculate Connection

Eddy

They'll also be good for Tommy Wonder's Card fold.

You coul also use them for Bruce Cervon's "Dirty Deal"

I've never worked with Casino cards before. This may be a really lame/stupid question, but what level of quality are they compared to USPCC cards?

There are a lot of Casino cards made by the USPCC. The Bee stock is their top line. Aristocrats are their budget stock.

As mentioned, Lenart Green's marketed effect "Stolen cards" is a wonderful effect using old casino cards and the method for the effect is not original with him anyway. Unfortunately, on this form using old Casino cards, it can pretty much only be used for the one effect.

However, it would also require 49 different decks to make one up---and the cards left over could probably only be used make up 49 more such decks. You could keep a couple for yourself and give all the rest away to your magician friends for Christmas or sell each deck for say two bucks and at least your investment back, but then everybody you know would be performing the same trick.

One could also make 52 different forcing decks, or 26 two way forcing decks or 17 3 way forcing decks---or 26 split forcing decks. You would have to decide if old casino cards would be more or less suspect for such a purpose.

Cheers