Jason Grilli [Gray Back] #638 2017 Topps Heritage Baseball — Card Value

Which version do you have?

If you just want the card, buy the Standard for only $1. The Gray Back at $10 and Blue Border at $5 offer slight variations, likely related to minor print runs or packaging, but they don't represent significant scarcity jumps. Casual collectors should stick to the Standard. Serious collectors willing to spend more for a distinct visual look might consider the Gray Back, while saving money is best achieved with the basic Standard version.