Unable to Send an Invoice: "This item is out of stock" is the message received

[vinylmagman]

Howdy.

I am having difficulty sending invoices to buyers. The message I received is that my item is out of stock.

Is anyone else having this issue?

Thanks.

[ebooksdiva]

Why are you sending invoices? Buyer clicks Buy it Now buyer can see how much they are required  to pay, then they pay.
Sending invoices is really unnecessary, eBay allows 4 days for buyers to pay. Sending invoices changes the date of sale, thus extending the buyers time to pay. 

If the buyer hasn’t paid for 4 days or 96 hours you can cancel for nonpayment. 

[boopie1fresh]

Combing multiple items to one invoice requires it.

I am having trouble on and off also.

[ebooksdiva]

I sell multiple items never had to send an invoice. I have combined shipping set up. 

[vinylmagman]

How does Buy It Now work when a buyer purchases multiple items from me?