Todd, go to http://clerk.ucnj.org/UCPA/DocIndex for Union County land records - you can search by party name (among others). You can also go here (http://www.njactb.org/) to search tax records by location, which will lead you to party names, and book & page numbers of recorded documents.
If you were planning to pay a used house sales dood(ette) $24,000 (est. 6% of $400,000) for that information, just send me $24 and we'll call it even.
Owner / Broker Manager
Marivic GMAC Real Estate
2056A Lincoln Hwy. (Rt.27)
Edison, NJ 08817-3330
Office: 732-650-9911 Ext.302
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If a home was listed in the MLS, your agent can very easily pull up the closed sales price for you. Otherwise, the tax office in the community of interest or the county seat would have the closed price information as well. Best of Luck to you. Lucy