Personally, these seem to be undergraded by a grade or so, but you can see pictures to determine for yourself. Fraction of what these were going for, he should get more hobby love for the HOF career and impact he had, but but perfect for a Duncan collector. Here are the 5 cards in the lot...

1997 Upper Deck Collector's Choice #379 Tim Duncan Hot Properties RC Rookie Card PSA 9 Pop 42 only 9 higher

1997-98 Upper Deck SP Authentic #165 Tim Duncan Future Watch Foil RC Rookie Card PSA 7 Pop 50. Think it is a grade low

1997-98 Fleer Flair Showcase #5 Tim Duncan Row 3 Showtime PSA 7 Pop 106. Tiny corner white but don't see reason for lower than 9

1997-98 Skybox #111 Tim Duncan Z Force RC Rookie Card. Appears to be NM-MT see pictures no major flaws I see

1998 Topps #49 Tim Duncan "dunking". Appears to be NM-MT see pictures no major flaws I see

HOF. MVP. Wake Forest. Spurs. NBA Champion.