No, but the seal of God on a believer has nothing to do with buying or selling.
Why do you assume the buying or selling has to refer to the buying or selling of material things? Is Jesus talking about buying physical gold and white garments here?
Revelation 3:18 I counsel you to buy from Me gold refined in the fire, that you may be rich; and white garments, that you may be clothed,
that the shame of your nakedness may not be revealed; and anoint your eyes with eye salve, that you may see.
Why wouldn't the mark of the beast simply be the spiritual opposite of the seal/mark of God? Those with the seal of God are saved and those with the mark of the beast are not. Revelation is a very highly symbolic book, so you should at least consider the possibility that the mark of the beast is not a literal, physical mark.
The mark of the beast enables a person to buy and sell.
We can take this literally and physically, because for the first time in human history, such a mark is now ready to be implemented via computer chip implants or RFID tattoo, monitored by AI data centers.
You need to remember that whatever the mark of the beast is, it is directly related to the worship of the beast and Revelation 13:8 says all whose names are not written in the book of life worship the beast. How can such a system be applied to literally all people in the world? That isn't reasonable.
The Greek word for "mark" in the biblical "mark of the beast" passage (in Revelation 13:16) is χάραγμα (charagma), meaning an etched stamp, branded seal, or carved inscription.
The Greek word for "lamb" refers to an animal, but that doesn't mean the word can't be used symbolically. Any time a word is used symbolically it's not being used in the normal sense. Any word can potentially be used symbolically.
The mark of the beast is an allusion to the custom among the Romans of branding or imprinting ownership marks upon their servants and soldiers, by which they might be known to whom they belonged; servants had them in their foreheads, and soldiers in their hands.
I disagree. The reference to it being on the right hand or forehead symbolically refers to people's actions and beliefs. Those whose actions and beliefs reflect that they reject God/Christ reveals that they have the mark of the beast.