This card is notorious for having surface issues as it's a foil card. It's extremely difficult to get a high grade on it. But getting it graded isn't really worth doing right now because most grading services are suspended due to a backlog of several million cards, and likely will continue to be suspended for at least another year or so. Really, the only cards worth grading right now are ones that are worth several thousand dollars.
That said, it's still a cool card that is very much in high demand. I think the card shop's offer is fair considering they are looking to resell it, but if you were to sell it on
eBay, you'd get more than that. Although you'd also have to pay
eBay fees and shipping costs, so that would eat into your profits.
I'd be interested in trading for it though. It's a rookie card of a great player and I don't have it, so I might as well trade you for it lol. Let me do some research first and I'll try to figure out a fair offer. PM coming.