I’ve dealt with expired auction paperwork before, and I’ve purchased from Southside Auto Sale several times for our dealership inventory.

I’d call the auction company first and explain that you still want the vehicles. If the invoice is already outside its validity period, I’d ask them to issue a new invoice before sending the payment.

With a larger fleet purchase, I’d rather have everything confirmed in writing than assume an expired invoice is still acceptable. In my experience with multiple purchases, getting the invoice corrected first has always been the better approach.