Bought Mispriced Merchandise Online, Notified Of Mistake, 8-days Later It's Now Out For Delivery

I spotted this newly listed collectible on a merchant's website for an unusual price. They are based in Virginia. I'm in Colorado. I was suspicious of the price immediately and looked up values of what are considered equivalents. Lo-and-behold similar collectibles had sold for at least 5x more what this one was listed for. I went ahead and bought the item intending to keep it (as opposed to flipping it for a profit), unsure if they had made a pricing error or for some unknown reason this particular item was no longer comparable to equivalents I had checked. To be clear no exact copy of this collectible exists. I immediately received an automated confirmation email and invoice thanking me for my purchase.

Two days later I found out it was indeed a pricing error. They had forgot to include a zero in the listing. I had paid 10x less than what they intended the price to be.

I was advised in that e-mail a refund would be processed (however no time frame was mentioned).

I responded to them that I understood the mistake and was only a little sad about the whole thing. At this point I was expecting a refund within 3-5 days. I was informed of their mistake Sunday morning.

Come Monday afternoon I get a notification that my order is shipping. I waited until Tuesday morning to see if USPS tracking showed it had been accepted, processed and departed from Virginia. Of course it was... So I e-mailed the same person who had informed me of the pricing mistake that they had shipped the order anyway.

Still in good faith I explained that I would be willing to work with them to return their merchandise.

Tuesday afternoon I receive an e-mail from another employee saying they are working to resolve the matter and stop the shipment. (I already knew this was going to be nearly impossible - it was not eligible for USPS Intercept and had been shipped on one their lowest level services). They mentioned if there's an issue stopping it they'd reach out to me.

We come to today, it’s in Colorado. No one has reached out to me. I very much doubt it’s going to be stopped. There's a high probability our carrier will also sign for the package and deliver it without a knock at the door. If they don't I'm going to sign for it anyway. I have not been refunded my money and refusing the package means it could be in USPS's custody for a few weeks.

I do want to do the right thing. But I shouldn't have to go out of my way to help them resolve THEIR mistake. I'm also a little peeved they have not refunded the charge yet.

At this point I'm going to wait for them to reach out now for instructions. I do want my refund processed ASAP. I also expect them to pay for the return shipping (not me paying for it and waiting for them to pay me back). I will not be opening the package.

• Am I being unreasonable? Should I expect the refund only when they have received the item back? They screwed up by processing the order and shipping it anyway. If the package is stopped before delivery should I only expect a refund when they have it back or before then?
• What legally can they do at this point? Can they later charge me the full amount they had intended the price to be without any further communication?
• I am also considering a chargeback, but leaving it as an absolute last resort. I don’t think that legally works as long as I have the merchandise in question anyway.

Thank you!