I wait 24 hours. If they say, "I'll take it" and don't ask you about payment instructions via PM within 24 hours it goes back up for sale. If they say, "I'll take it" via PM same 24 hour rule applies. If it wasn't important enough to them to contact you about payment for an entire day then the purchase wasn't that important. I see a lot of guys saying "I'll take it" as if layaway is an option and they hold onto the item to see if they can score a better deal elsewhere screwing over the seller. Contact him via PM and tell him he has " " hours to respond or it's going back up for sale. When I buy something here I make sure I send a PM right after "I'll take it" asking for payment info. Then I send payment either that minute via PayPal or the next day via MO with a tracking number. If I sell something I send the product right after I get payment with a tracking number and keep the buyer informed every step of the way.