Due to the nature of DMs in nostr, shopstr can be a bit unreliable. By all means, list your stuff there, but also having your own site which accepts lightning is probably the way to go. BTCPay Server is a great option, it integrates with woocommerce and magneto. I believe squarespace also allows BTC lightning payments.

I ALWAYS search for a vendor who takes BTC for anything I shop for, excited to see more joining.