If you know the sellers name then you can find the info here. Look for Search Records. If the sale was in the past few weeks it will be in as an "Unverified Grantor". If not just search "Grantor"
To figure the sale price multiply the tax stamp amount found on the deed by $15.00 and you will get the price in thousands. ie: Tax amount of $5625.00 = $15 x 375 ($375,000 sale price).
http://nhdeeds.com/belk/web/BeHome.html