IP's are very tough to purchase.
I have about 1,000 IP autos, and if I sent in any of my 9 IP Brodeur RC's to get authenticated I would say one maybe two TOPS would get the ok, yet I witnessed them ALL get signed, it's just amazing how different one autograph can be.
With fakes you can often tell if it's perfect. I got a signed Toews/Kane/Campbell photo IP earlier this year and the Toews doesn't look like his cards much at all.
I will probably never part with my IP stuff, the sentimental value is higher than the cash I would get.