Unfortunately, the tax records do not reflect what the investor paid for it in the foreclosure. The deed to you shows an investment company and a man as Grantor, you as Grantee, and it shows what YOU paid for it.
However, in reviewing the sales for the year 2006 in Roselle, the averages were in the low to high $200's and higher, depending, of course, upon the style of house, size, number of bedrooms/baths, etc, so you may not have paid too much, depending upon the specifics of this home.
I don't think you should worry what the man paid for it, because it's really irrelevant. What is more important is that you paid market value for the home, and I assume that is what you wish to know.
It's easy to do a quick view of comparable homes sold in the months surrounding 9/2006, but more details are required. Unfortunately, though the tax records usually reflect the type of house and sq. footage, and even number of bedrooms, this record is incomplete. Looking at today's sales would be futile, as prices have gone down since you purchased the property, so if you want to know that you paid a fair price THEN, only the sales from that time period should be reviewed.
If you want to give me more details, I can do a quick view for you.
Email me: firstname.lastname@example.org