I've had the experience of needing to book 4 airplane tickets through a reseller, and having a hunch it would be cheaper to book in 2 goes since there were only

I've had the experience of needing to book 4 airplane tickets through a reseller, and having a hunch it would be cheaper to book in 2 goes since there were only "2 tickets left at this price". Since they had 24hr cancellation, I took the chance, booked 2 tickets, and was right, after a few minutes, 2 more tickets were available at the original price.