To be sure, not all auctions are rip-offs.
( ( To ( be sure ) ) ( , ( ( not ( all auctions ) ) ( ( are rip-offs ) . ) ) ) )
(ROOT (S (S (VP (TO To) (VP (VB be) (ADJP (JJ sure))))) (, ,) (NP (RB not) (DT all) (NNS auctions)) (VP (VBP are) (ADJP (JJ rip-offs))) (. .)))
Not ever auction over charges the buyer or under pays the seller.
( Not ( ever ( auction ( ( ( ( over ( charges ( the buyer ) ) ) or ) ( under ( pays ( the seller ) ) ) ) . ) ) ) )
(ROOT (S (RB Not) (ADVP (RB ever)) (NP (NN auction)) (VP (VP (ADVP (RB over)) (VBZ charges) (NP (DT the) (NN buyer))) (CC or) (VP (ADVP (IN under)) (VBZ pays) (NP (DT the) (NN seller)))) (. .)))