Jun 30, 2026 Ungraded $38 e b a y
1956 Topps - Harmon Killebrew #164 Gray Back #164 Jun 30, 2026 PSA 6 $372 e b a y
1956 Topps 164 Harmon Killebrew Gray Back PSA 6 94562086 #164b Jun 30, 2026 PSA 5 $160 e b a y
1956 Topps Harmon Killebrew #164 Gray Back PSA 5 WZ245 #164 Jun 29, 2026 Ungraded $54 e b a y
1956 Topps #164 Harmon Killebrew Senators Gray Back HOF EX-EXMINT+ 2nd YR #164b Jun 29, 2026 PSA 4 $100 e b a y
1956 TOPPS GRAY BACK #164 HARMON KILLEBREW PSA 4 #164 Jun 26, 2026 SGC 4 $145 e b a y
1956 Topps #164 Harmon Killebrew SGC VG-EX+ 4.5 Gray Back *4196 Jun 24, 2026 PSA 5 $130 e b a y
1956 Topps #164 Harmon Killebrew Gray Back PSA 5 #164b Jun 21, 2026 PSA 4 $129 e b a y
1956 Topps #164 Harmon Killebrew Washington Nationals HOF Gray Back PSA 4 VG-EX #164 Jun 18, 2026 PSA 7 $525 e b a y
1956 Topps #164 Harmon Killebrew Gray Back PSA 7 NM New Grade #164 Jun 17, 2026 PSA 7.5 $681 e b a y
1956 Topps Set-Break #164 Harmon Killebrew Gray Back PSA 7.5 NM+ #164 Jun 17, 2026 PSA 5 $175 e b a y
1956 Topps - Harmon Killebrew #164 Gray Back PSA 5 EX Washington Nationals MLB #164 Jun 17, 2026 PSA 3 $89 e b a y
🔥1956 Topps HARMON KILLEBREW #164 * PSA 3 VG GRAY BACK🔥 #164 Jun 14, 2026 PSA 4 $85 e b a y
1956 Topps Set-Break #164 Harmon Killebrew Gray Back PSA 4 VG-EX #164 Jun 14, 2026 PSA 1 $21 e b a y
1956 Topps Baseball Harmon Killebrew #164- Gray Back PSA 1 #164 Jun 13, 2026 Ungraded $46 e b a y
1956 Topps - Harmon Killebrew #164 Gray Back #164 Jun 9, 2026 SGC 3.5 $100 e b a y
1956 Topps HARMON KILLEBREW 2nd Year Card #164 SGC 3.5 VG+ Condition GRAY #164 Jun 8, 2026 PSA 4 $105 e b a y
1956 Topps - Harmon Killebrew #164 Gray Back PSA 4 VG-EX #164 Jun 8, 2026 PSA 3 $83 e b a y
1956 Topps Set-Break #164 Harmon Killebrew Gray Back PSA 3 VG #164 Jun 7, 2026 PSA 6 $270 e b a y
1956 Topps Gray Back #164 / Harmon Killebrew / PSA 6 EX-MINT #164 Jun 6, 2026 Ungraded $40 e b a y
1956 Topps Harmon Killebrew #164 Gray Back Washington Nationals HOF (fair)(f8) #164 Jun 6, 2026 PSA 1 $75 e b a y
1956 TOPPS GRAY BACK #164 HARMON KILLEBREW PSA 1 #164 Jun 3, 2026 PSA 5 $153 e b a y
1956 TOPPS GRAY BACK HARMON KILLEBREW NATIONALS CARD #164 PSA 5 BCL Jun 3, 2026 PSA 2 $100 e b a y
1956 Topps Harmon Killebrew #164 Gray Back PSA 2 #164 May 30, 2026 Ungraded $52 e b a y
Topps 1956 Harmon Killebrew #164 Washington Senators Gray Back PSA VG-3 #164 May 28, 2026 PSA 5 $180 e b a y
1956 TOPPS GRAY BACK #164 HARMON KILLEBREW PSA 5 #164 May 28, 2026 PSA 4 $99 e b a y
1956 Topps - Harmon Killebrew #164 Gray Back PSA 4 VG-EX #164 May 26, 2026 PSA 3 $90 e b a y
1956 Topps HARMON KILLEBREW #164 * PSA 3 VG * CENTERED * GRAY BACK #164 May 24, 2026 Ungraded $47 e b a y
1956 Topps #164b Harmon Killebrew : Gray Back #164b May 21, 2026 Ungraded $35 e b a y
Topps 1956 Harmon Killebrew #164 Washington Senators Gray Back Baseball Card #164 May 20, 2026 PSA 4 $126 e b a y
1956 Topps Baseball Harmon Killebrew Nationals Gray Back Card #164 PSA 4 #164 May 19, 2026 PSA 8 $1,216 e b a y
1956 TOPPS GRAY BACK #164 HARMON KILLEBREW PSA 8 #164 May 18, 2026 Ungraded $19 e b a y
1956 Topps HOF Harmon Killebrew #164: Washington Nats, Gray Back, Free Shipping #164 May 17, 2026 SGC 4.5 $147 e b a y
1956 Topps Harmon Killebrew #164 Gray Back SGC 4.5 #164 May 16, 2026 Ungraded $42 e b a y
1956 Topps - Harmon Killebrew #164 Gray Back - Good #164 May 16, 2026 SGC 1 $36 e b a y
1956 Topps Harmon Killebrew Gray Back #164 SGC 1 Washington HOF - Writing #164 May 14, 2026 Ungraded $43 e b a y
Topps 1956 Harmon Killebrew #164 Washington Senators Gray Back Baseball Card #164 May 14, 2026 PSA 6 $325 e b a y
1956 Topps Harmon Killebrew Gray Back Washington Nats PSA 6 Perfect Centering #164 May 14, 2026 PSA 5 $131 e b a y
1956 Topps #164 Harmon Killebrew- Gray Back - PSA 5 EX #164 May 11, 2026 Ungraded $27 e b a y
1956 Topps - Harmon Killebrew #164 Gray Back #164 May 11, 2026 PSA 5 $147 e b a y
1956 TOPPS #164 HARMON KILLEBREW HOF GRAY BACK PSA 5 May 9, 2026 Ungraded $30 e b a y
Topps 1956 Harmon Killebrew Washington Senators Gray Back Baseball Card #164 #164 May 7, 2026 Ungraded $31 e b a y
1956 Topps #164 Harmon Killebrew Gray Back VG-VGEX Former Grader #164 May 7, 2026 SGC 3 $80 e b a y
1956 Topps - Harmon Killebrew #164 Gray Back SGC 3 #164 May 6, 2026 PSA 3 $92 e b a y
1956 Topps Set-Break #164 Harmon Killebrew Gray Back PSA 3 VG #164 May 6, 2026 SGC 2 $63 e b a y
1956 Topps Harmon Killebrew #164 Gray Back SGC 2 #164 May 5, 2026 SGC 1.5 $55 e b a y
Harmon Killebrew 1956 Topps SGC 1.5 FR Graded Card Nationals HOF Gray Back #164 May 4, 2026 Ungraded $72 e b a y
1956 Topps - Harmon Killebrew #164 Gray Back #164 Apr 29, 2026 PSA 4 $75 e b a y
1956 Topps Harmon Killebrew #164 Gray Back PSA 4 #164 Apr 29, 2026 SGC 4.5 $147 e b a y
1956 Topps Harmon Killebrew #164 Gray Back SGC 4.5 #164 Apr 28, 2026 Ungraded $37 e b a y
1956 Topps #164 HARMON KILLEBREW HOF Washington Senators GRAY BACK #164 
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