We Combine Shipping: Thank you for shopping with TJ Model Trains, we will combine your multiple purchases. Please wait to make payment until you receive a combined invoice from us. (Just commit to buy on all items you are needing, and then wait for the combined shipping invoice, please do not pay for items separately) Invoices are sent once a day. We do NOT demand immediate payment as some sellers do, so you may receive multiple invoices (just pay from the invoice received after your last purchase) payment should be made within 5 days of initial purchase.