"DM me for prices" works right up until you're busy — and it silently loses every customer who wasn't going to message a stranger to find out what something costs.
Sizes, colours and stock counts are what separates a shop from a catalogue. Get them right for five products and the next fifty are repetition.
Tell the chat "add Stripe to my store" and it handles the setup. Orders land in one place and the money goes to your own account.