I've been feverishly chasing '67 high numbers for a couple years to try and complete my set. Other than the Seaver (which is a whole different animal), I'm almost done. I've purchased on forums, eBay, or at local card shows/shops. Early in my chase, after a couple times of paying too much for a card labeled as a 'SP' that I found was selling for much less on eBay, I decided to create my own price list to help me know when to pull the trigger.
I like to buy raw, crease free, well-presenting cards that would typically grade a 5 or 6 or so. The prices I list, I define as "good deals" and basically if you can purchase an EX or better card at that price, do it.
The Topps Archives blog had a well researched post (
link) in 2011 about price guide labeled single prints and sheet layout.
534 Bauer
DP $5
535 Clendenon $25
536 RCs (Niekro) $35
537 Estrada
DP $4
538 Martin $10
539 Egan
DP $6
540 Cash $35
541 Gibbon $8
542 RCs (Monday)
DP $10
543 Schneider $8
544 Indians $25
545 Grant $15
546 Woodward $8
547 RCs
DP $5
548 Gonzalez
DP $5
549 Sanford $8
550 Pinson
DP $8
551 Camilli
DP $8
552 Savage $15
553 RCs $25
554 Rodgers
DP $10
555 Cardwell $18
556 Weis
DP $5
557 Ferrara $13
558 RCs (Belanger) $40
559 Tracewski
DP $5
560 Bunning $40
561 Alomar $20
562 Bass
DP $10
563 Adcock $18
564 RCs
DP $8
565 Krausse $8
566 Geiger
DP $5
567 Hamilton $15
568 Sullivan $15
569 RCs (Carew)
DP $140
570 Wills $25
571 Sherry $12
572 Demeter $30
573 White Sox $20
574 Buchek $15
575 Boswell $12
576 RCs (Hernandez) $30
577 Short $15
578 Boccabella $12
579 Henry $12
580 Colavito $55
581 RCs (Seaver) $350
582 Owens
DP $5
583 Barker $15
584 Piersall $10
585 Bunker $12
586 Jimenez $10
587 RCs (Sutherland) $30
588 Klippstein
DP $5
589 Ricketts
DP $5
590 Richert $8
591 Cline $12
592 RCs (Shellenback) $35
593 Westrum $20
594 Osinski $15
595 Rojas $25
596 Cisco
DP $8
597 Abernathy $8
598 RCs $8
599 Duliba
DP $5
600 Robinson $100
601 Bryan
DP $8
602 Pizarro $15
603 RCs $12
604 Red Sox $55
605 Shannon $50
606 Taylor $15
607 Stanley $40
608 RCs
DP $5
609 John $35
In summary, other than Carew, the 'DP' cards are easily available for < $10 and seem to consistently demand a lower price suggesting they're all correctly identified as double prints. However, there's a wide range of selling prices among the "common" non-DPs. With some "no name" guys selling in the $30+ range and others for < $10 which suggests a wide variance in demand among single prints (be it artificially created or by production numbers).
Anyway, thought this might help somebody else out there chasing '67 high numbers.