It depends entirely on what you sell, and the answer is a real no for a lot of stock.
What it costs you
An hour, live, on a schedule. Plus preparation and packing afterwards.
Being on camera, talking, for that hour. Some people find this easy and some find it exhausting, and that is not something advice can change.
A rhythm, if you want it to compound. One show is a trial; a slot people can remember is a business. Do I have to go live on a schedule?
That is a genuine cost and it is why the answer is not automatically yes.
When it is clearly worth it
When condition varies and cannot be photographed. Second-hand, vintage, handmade, collectible. A seller turning the thing over on request is information a listing cannot carry, and buyers pay for it. Why some things sell better live
When nobody knows what it is worth. An auction finds the price. For one-of-a-kind stock that is the only honest way to price it.
When you are good at explaining things. If people buy from you in person because you know your subject, that transfers directly.
When you have enough stock to fill shows. Twelve items a week, sustainably.
When it is not
Uniform, new, branded goods where the buyer only cares about price. Nothing you say on camera beats a cheaper listing elsewhere.
One or two items. List them. A show for two things is an hour for two things. Can I sell without going live?
When you cannot keep a slot. A missed show costs more than a slot you never claimed — people who turned up and found nothing do not turn up twice.
The honest test
Run three shows before deciding anything. Not one — three, because the first is a rehearsal whatever you call it.
Then look at sell-through, not viewers. The share of what you put up that actually sold is the number that tells you whether the format suits your stock. What is sell-through?
If it is poor across three shows at sensible times, the format may not be the problem — but the stock might be.
What it costs in money
Nothing. Listing is free, shows are free, there is no monthly charge, and the commission comes off a sale that happened. The investment is time. What does it cost to sell?
The middle path most stores land on
Ordinary listings running all the time, plus a show when there is enough to fill one. The listings sell while you sleep; the shows bring people who then follow you.
More: what sells well in a live auction, how much can a seller actually make, what does a realistic first month look like.